23656513 has 2 divisors, whose sum is σ = 23656514. Its totient is φ = 23656512.

The previous prime is 23656511. The next prime is 23656517. The reversal of 23656513 is 31565632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23648769 + 7744 = 4863^2 + 88^2 .

It is a cyclic number.

It is not a de Polignac number, because 23656513 - 2¹ = 23656511 is a prime.

Together with 23656511, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (23656511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11828256 + 11828257.

It is an arithmetic number, because the mean of its divisors is an integer number (11828257).

Almost surely, 2^23656513 is an apocalyptic number.

It is an amenable number.

23656513 is a deficient number, since it is larger than the sum of its proper divisors (1).

23656513 is an equidigital number, since it uses as much as digits as its factorization.

23656513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 31.

The square root of 23656513 is about 4863.7961511560. The cubic root of 23656513 is about 287.0672021081.

The spelling of 23656513 in words is "twenty-three million, six hundred fifty-six thousand, five hundred thirteen".