23957 has 2 divisors, whose sum is σ = 23958. Its totient is φ = 23956.

The previous prime is 23929. The next prime is 23971. The reversal of 23957 is 75932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22801 + 1156 = 151^2 + 34^2 .

It is a cyclic number.

It is not a de Polignac number, because 23957 - 2⁶ = 23893 is a prime.

It is an Ulam number.

It is a plaindrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11978 + 11979.

It is an arithmetic number, because the mean of its divisors is an integer number (11979).

2²³⁹⁵⁷ is an apocalyptic number.

It is an amenable number.

23957 is a deficient number, since it is larger than the sum of its proper divisors (1).

23957 is an equidigital number, since it uses as much as digits as its factorization.

23957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1890, while the sum is 26.

The square root of 23957 is about 154.7804897266. The cubic root of 23957 is about 28.8277542378.

The spelling of 23957 in words is "twenty-three thousand, nine hundred fifty-seven".