23870557 has 4 divisors (see below), whose sum is σ = 23933920. Its totient is φ = 23807196.

The previous prime is 23870549. The next prime is 23870591. The reversal of 23870557 is 75507832.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23870557 - 2³ = 23870549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23870507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31113 + ... + 31870.

It is an arithmetic number, because the mean of its divisors is an integer number (5983480).

Almost surely, 2^23870557 is an apocalyptic number.

It is an amenable number.

23870557 is a deficient number, since it is larger than the sum of its proper divisors (63363).

23870557 is an equidigital number, since it uses as much as digits as its factorization.

23870557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63362.

The product of its (nonzero) digits is 58800, while the sum is 37.

The square root of 23870557 is about 4885.7504029576. The cubic root of 23870557 is about 287.9303980788.

The spelling of 23870557 in words is "twenty-three million, eight hundred seventy thousand, five hundred fifty-seven".