23957861 has 2 divisors, whose sum is σ = 23957862. Its totient is φ = 23957860.

The previous prime is 23957851. The next prime is 23957887. The reversal of 23957861 is 16875932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16564900 + 7392961 = 4070^2 + 2719^2 .

It is a cyclic number.

It is not a de Polignac number, because 23957861 - 2¹⁰ = 23956837 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23957831) 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, 11978930 + 11978931.

It is an arithmetic number, because the mean of its divisors is an integer number (11978931).

Almost surely, 2^23957861 is an apocalyptic number.

It is an amenable number.

23957861 is a deficient number, since it is larger than the sum of its proper divisors (1).

23957861 is an equidigital number, since it uses as much as digits as its factorization.

23957861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 41.

The square root of 23957861 is about 4894.6768024048. The cubic root of 23957861 is about 288.2809958427.

The spelling of 23957861 in words is "twenty-three million, nine hundred fifty-seven thousand, eight hundred sixty-one".