253968931 has 2 divisors, whose sum is σ = 253968932. Its totient is φ = 253968930.

The previous prime is 253968919. The next prime is 253968937. The reversal of 253968931 is 139869352.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 253968931 - 2⁹ = 253968419 is a prime.

It is a super-2 number, since 2×253968931² = 129000435826565522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (253968937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126984465 + 126984466.

It is an arithmetic number, because the mean of its divisors is an integer number (126984466).

Almost surely, 2^253968931 is an apocalyptic number.

253968931 is a deficient number, since it is larger than the sum of its proper divisors (1).

253968931 is an equidigital number, since it uses as much as digits as its factorization.

253968931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 46.

The square root of 253968931 is about 15936.4026994802. The cubic root of 253968931 is about 633.2767304600.

The spelling of 253968931 in words is "two hundred fifty-three million, nine hundred sixty-eight thousand, nine hundred thirty-one".