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69689 = 227307
BaseRepresentation
bin10001000000111001
310112121002
4101000321
54212224
61254345
7410114
oct210071
9115532
1069689
11483a4
12343b5
1325949
141b57b
15159ae
hex11039

69689 has 4 divisors (see below), whose sum is σ = 70224. Its totient is φ = 69156.

The previous prime is 69677. The next prime is 69691. The reversal of 69689 is 98696.

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 69689 - 216 = 4153 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (69389) 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, 74 + ... + 380.

It is an arithmetic number, because the mean of its divisors is an integer number (17556).

269689 is an apocalyptic number.

It is an amenable number.

69689 is a deficient number, since it is larger than the sum of its proper divisors (535).

69689 is a wasteful number, since it uses less digits than its factorization.

69689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534.

The product of its digits is 23328, while the sum is 38.

The square root of 69689 is about 263.9867420913. The cubic root of 69689 is about 41.1517281127.

The spelling of 69689 in words is "sixty-nine thousand, six hundred eighty-nine".

Divisors: 1 227 307 69689