23697639 has 12 divisors (see below), whose sum is σ = 39120016. Its totient is φ = 13541472.

The previous prime is 23697629. The next prime is 23697647. The reversal of 23697639 is 93679632.

23697639 is a `hidden beast` number, since 2 + 3 + 6 + 9 + 7 + 639 = 666.

It is not a de Polignac number, because 23697639 - 2⁴ = 23697623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23697594 and 23697603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23697629) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 188014 + ... + 188139.

Almost surely, 2^23697639 is an apocalyptic number.

23697639 is a deficient number, since it is larger than the sum of its proper divisors (15422377).

23697639 is a wasteful number, since it uses less digits than its factorization.

23697639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376166 (or 376163 counting only the distinct ones).

The product of its digits is 367416, while the sum is 45.

The square root of 23697639 is about 4868.0220829409. The cubic root of 23697639 is about 287.2334578162.

It can be divided in two parts, 23697 and 639, that added together give a square (24336 = 156²).

The spelling of 23697639 in words is "twenty-three million, six hundred ninety-seven thousand, six hundred thirty-nine".