253398979 has 2 divisors, whose sum is σ = 253398980. Its totient is φ = 253398978.

The previous prime is 253398913. The next prime is 253399007. The reversal of 253398979 is 979893352.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 253398979 - 2⁷ = 253398851 is a prime.

It is a super-2 number, since 2×253398979² = 128422085116484882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (253393979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126699489 + 126699490.

It is an arithmetic number, because the mean of its divisors is an integer number (126699490).

Almost surely, 2^253398979 is an apocalyptic number.

253398979 is a deficient number, since it is larger than the sum of its proper divisors (1).

253398979 is an equidigital number, since it uses as much as digits as its factorization.

253398979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3674160, while the sum is 55.

The square root of 253398979 is about 15918.5105773122. The cubic root of 253398979 is about 632.8026466451.

The spelling of 253398979 in words is "two hundred fifty-three million, three hundred ninety-eight thousand, nine hundred seventy-nine".