23656939 has 2 divisors, whose sum is σ = 23656940. Its totient is φ = 23656938.

The previous prime is 23656907. The next prime is 23656961. The reversal of 23656939 is 93965632.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23656939 - 2⁵ = 23656907 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23656895 and 23656904.

It is not a weakly prime, because it can be changed into another prime (23653939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11828469 + 11828470.

It is an arithmetic number, because the mean of its divisors is an integer number (11828470).

Almost surely, 2^23656939 is an apocalyptic number.

23656939 is a deficient number, since it is larger than the sum of its proper divisors (1).

23656939 is an equidigital number, since it uses as much as digits as its factorization.

23656939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 262440, while the sum is 43.

The square root of 23656939 is about 4863.8399439126. The cubic root of 23656939 is about 287.0689252402.

It can be divided in two parts, 236 and 56939, that added together give a palindrome (57175).

The spelling of 23656939 in words is "twenty-three million, six hundred fifty-six thousand, nine hundred thirty-nine".