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214969 = 227947
BaseRepresentation
bin110100011110111001
3101220212211
4310132321
523334334
64335121
71553506
oct643671
9356784
10214969
11137567
12a44a1
1376b01
14584ad
1543a64
hex347b9

214969 has 4 divisors (see below), whose sum is σ = 216144. Its totient is φ = 213796.

The previous prime is 214967. The next prime is 214987. The reversal of 214969 is 969412.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 214969 - 21 = 214967 is a prime.

It is a super-2 number, since 2×2149692 = 92423341922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 214969.

It is not an unprimeable number, because it can be changed into a prime (214967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247 + ... + 700.

It is an arithmetic number, because the mean of its divisors is an integer number (54036).

2214969 is an apocalyptic number.

It is an amenable number.

214969 is a deficient number, since it is larger than the sum of its proper divisors (1175).

214969 is an equidigital number, since it uses as much as digits as its factorization.

214969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1174.

The product of its digits is 3888, while the sum is 31.

The square root of 214969 is about 463.6474954100. The cubic root of 214969 is about 59.9043847467.

The spelling of 214969 in words is "two hundred fourteen thousand, nine hundred sixty-nine".

Divisors: 1 227 947 214969