253680971 has 2 divisors, whose sum is σ = 253680972. Its totient is φ = 253680970.

The previous prime is 253680887. The next prime is 253681003. The reversal of 253680971 is 179086352.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 253680971 - 2²⁶ = 186572107 is a prime.

It is not a weakly prime, because it can be changed into another prime (253680071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126840485 + 126840486.

It is an arithmetic number, because the mean of its divisors is an integer number (126840486).

Almost surely, 2^253680971 is an apocalyptic number.

253680971 is a deficient number, since it is larger than the sum of its proper divisors (1).

253680971 is an equidigital number, since it uses as much as digits as its factorization.

253680971 is an evil number, because the sum of its binary digits is even.

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

The square root of 253680971 is about 15927.3654758092. The cubic root of 253680971 is about 633.0372952244.

The spelling of 253680971 in words is "two hundred fifty-three million, six hundred eighty thousand, nine hundred seventy-one".