23397131 has 2 divisors, whose sum is σ = 23397132. Its totient is φ = 23397130.

The previous prime is 23397109. The next prime is 23397139. The reversal of 23397131 is 13179332.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23397131 is a prime.

It is a super-2 number, since 2×23397131² = 1094851478062322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 23397094 and 23397103.

It is not a weakly prime, because it can be changed into another prime (23397139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11698565 + 11698566.

It is an arithmetic number, because the mean of its divisors is an integer number (11698566).

Almost surely, 2^23397131 is an apocalyptic number.

23397131 is a deficient number, since it is larger than the sum of its proper divisors (1).

23397131 is an equidigital number, since it uses as much as digits as its factorization.

23397131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3402, while the sum is 29.

The square root of 23397131 is about 4837.0580935110. The cubic root of 23397131 is about 286.0141605455.

The spelling of 23397131 in words is "twenty-three million, three hundred ninety-seven thousand, one hundred thirty-one".