23930981 has 2 divisors, whose sum is σ = 23930982. Its totient is φ = 23930980.

The previous prime is 23930953. The next prime is 23931007. The reversal of 23930981 is 18903932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21996100 + 1934881 = 4690^2 + 1391^2 .

It is a cyclic number.

It is not a de Polignac number, because 23930981 - 2¹⁸ = 23668837 is a prime.

It is a super-2 number, since 2×23930981² = 1145383703244722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23930941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11965490 + 11965491.

It is an arithmetic number, because the mean of its divisors is an integer number (11965491).

Almost surely, 2^23930981 is an apocalyptic number.

It is an amenable number.

23930981 is a deficient number, since it is larger than the sum of its proper divisors (1).

23930981 is an equidigital number, since it uses as much as digits as its factorization.

23930981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 23930981 is about 4891.9301916524. The cubic root of 23930981 is about 288.1731412917.

The spelling of 23930981 in words is "twenty-three million, nine hundred thirty thousand, nine hundred eighty-one".