23508557 has 2 divisors, whose sum is σ = 23508558. Its totient is φ = 23508556.

The previous prime is 23508547. The next prime is 23508559. The reversal of 23508557 is 75580532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22005481 + 1503076 = 4691^2 + 1226^2 .

It is a cyclic number.

It is not a de Polignac number, because 23508557 - 2⁶ = 23508493 is a prime.

Together with 23508559, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23508559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11754278 + 11754279.

It is an arithmetic number, because the mean of its divisors is an integer number (11754279).

Almost surely, 2^23508557 is an apocalyptic number.

It is an amenable number.

23508557 is a deficient number, since it is larger than the sum of its proper divisors (1).

23508557 is an equidigital number, since it uses as much as digits as its factorization.

23508557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42000, while the sum is 35.

The square root of 23508557 is about 4848.5623642478. The cubic root of 23508557 is about 286.4674776050.

The spelling of 23508557 in words is "twenty-three million, five hundred eight thousand, five hundred fifty-seven".