23397139 has 2 divisors, whose sum is σ = 23397140. Its totient is φ = 23397138.

The previous prime is 23397131. The next prime is 23397149. The reversal of 23397139 is 93179332.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23397139 - 2³ = 23397131 is a prime.

It is a super-2 number, since 2×23397139² = 1094852226770642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23397098 and 23397107.

It is not a weakly prime, because it can be changed into another prime (23397131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11698569 + 11698570.

It is an arithmetic number, because the mean of its divisors is an integer number (11698570).

Almost surely, 2^23397139 is an apocalyptic number.

23397139 is a deficient number, since it is larger than the sum of its proper divisors (1).

23397139 is an equidigital number, since it uses as much as digits as its factorization.

23397139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30618, while the sum is 37.

The square root of 23397139 is about 4837.0589204598. The cubic root of 23397139 is about 286.0141931437.

The spelling of 23397139 in words is "twenty-three million, three hundred ninety-seven thousand, one hundred thirty-nine".