23149957 has 2 divisors, whose sum is σ = 23149958. Its totient is φ = 23149956.

The previous prime is 23149943. The next prime is 23149967. The reversal of 23149957 is 75994132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21818241 + 1331716 = 4671^2 + 1154^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23149957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23149967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11574978 + 11574979.

It is an arithmetic number, because the mean of its divisors is an integer number (11574979).

Almost surely, 2^23149957 is an apocalyptic number.

It is an amenable number.

23149957 is a deficient number, since it is larger than the sum of its proper divisors (1).

23149957 is an equidigital number, since it uses as much as digits as its factorization.

23149957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 40.

The square root of 23149957 is about 4811.4402209733. The cubic root of 23149957 is about 285.0034143430.

The spelling of 23149957 in words is "twenty-three million, one hundred forty-nine thousand, nine hundred fifty-seven".