23157943 has 2 divisors, whose sum is σ = 23157944. Its totient is φ = 23157942.

The previous prime is 23157853. The next prime is 23157949. The reversal of 23157943 is 34975132.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23157943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23157899 and 23157908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23157949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11578971 + 11578972.

It is an arithmetic number, because the mean of its divisors is an integer number (11578972).

Almost surely, 2^23157943 is an apocalyptic number.

23157943 is a deficient number, since it is larger than the sum of its proper divisors (1).

23157943 is an equidigital number, since it uses as much as digits as its factorization.

23157943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 34.

The square root of 23157943 is about 4812.2700464542. The cubic root of 23157943 is about 285.0361829510.

The spelling of 23157943 in words is "twenty-three million, one hundred fifty-seven thousand, nine hundred forty-three".