23156957 has 2 divisors, whose sum is σ = 23156958. Its totient is φ = 23156956.

The previous prime is 23156933. The next prime is 23156963. The reversal of 23156957 is 75965132.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23145721 + 11236 = 4811^2 + 106^2 .

It is a cyclic number.

It is not a de Polignac number, because 23156957 - 2⁶ = 23156893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23156957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23186957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11578478 + 11578479.

It is an arithmetic number, because the mean of its divisors is an integer number (11578479).

Almost surely, 2^23156957 is an apocalyptic number.

It is an amenable number.

23156957 is a deficient number, since it is larger than the sum of its proper divisors (1).

23156957 is an equidigital number, since it uses as much as digits as its factorization.

23156957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56700, while the sum is 38.

The square root of 23156957 is about 4812.1675989101. The cubic root of 23156957 is about 285.0321375476.

The spelling of 23156957 in words is "twenty-three million, one hundred fifty-six thousand, nine hundred fifty-seven".