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199929 = 366643
BaseRepresentation
bin110000110011111001
3101011020210
4300303321
522344204
64141333
71461612
oct606371
9334223
10199929
11127234
1297849
1370002
1452c09
153e389
hex30cf9

199929 has 4 divisors (see below), whose sum is σ = 266576. Its totient is φ = 133284.

The previous prime is 199921. The next prime is 199931. The reversal of 199929 is 929991.

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.

It is not a de Polignac number, because 199929 - 23 = 199921 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33319 + ... + 33324.

It is an arithmetic number, because the mean of its divisors is an integer number (66644).

2199929 is an apocalyptic number.

It is an amenable number.

199929 is a deficient number, since it is larger than the sum of its proper divisors (66647).

199929 is an equidigital number, since it uses as much as digits as its factorization.

199929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66646.

The product of its digits is 13122, while the sum is 39.

The square root of 199929 is about 447.1342080405. The cubic root of 199929 is about 58.4734337699.

It can be divided in two parts, 199 and 929, that added together give a triangular number (1128 = T47).

The spelling of 199929 in words is "one hundred ninety-nine thousand, nine hundred twenty-nine".

Divisors: 1 3 66643 199929