23696639 has 4 divisors (see below), whose sum is σ = 23726256. Its totient is φ = 23667024.

The previous prime is 23696633. The next prime is 23696641. The reversal of 23696639 is 93669632.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23696639 - 2⁸ = 23696383 is a prime.

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 23696639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23696633) 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, 13574 + ... + 15219.

It is an arithmetic number, because the mean of its divisors is an integer number (5931564).

Almost surely, 2^23696639 is an apocalyptic number.

23696639 is a deficient number, since it is larger than the sum of its proper divisors (29617).

23696639 is an equidigital number, since it uses as much as digits as its factorization.

23696639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29616.

The product of its digits is 314928, while the sum is 44.

The square root of 23696639 is about 4867.9193707374. The cubic root of 23696639 is about 287.2294175051.

The spelling of 23696639 in words is "twenty-three million, six hundred ninety-six thousand, six hundred thirty-nine".