57720523 has 4 divisors (see below), whose sum is σ = 65966320. Its totient is φ = 49474728.

The previous prime is 57720521. The next prime is 57720539. The reversal of 57720523 is 32502775.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 57720523 - 2¹ = 57720521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57720521) 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, 4122888 + ... + 4122901.

It is an arithmetic number, because the mean of its divisors is an integer number (16491580).

Almost surely, 2^57720523 is an apocalyptic number.

57720523 is a deficient number, since it is larger than the sum of its proper divisors (8245797).

57720523 is an equidigital number, since it uses as much as digits as its factorization.

57720523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8245796.

The product of its (nonzero) digits is 14700, while the sum is 31.

The square root of 57720523 is about 7597.4023850261. The cubic root of 57720523 is about 386.4649265529.

The spelling of 57720523 in words is "fifty-seven million, seven hundred twenty thousand, five hundred twenty-three".