57936621 has 4 divisors (see below), whose sum is σ = 77248832. Its totient is φ = 38624412.

The previous prime is 57936617. The next prime is 57936623. The reversal of 57936621 is 12663975.

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 not a de Polignac number, because 57936621 - 2² = 57936617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 57936621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57936623) 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, 9656101 + ... + 9656106.

It is an arithmetic number, because the mean of its divisors is an integer number (19312208).

Almost surely, 2^57936621 is an apocalyptic number.

It is an amenable number.

57936621 is a deficient number, since it is larger than the sum of its proper divisors (19312211).

57936621 is a wasteful number, since it uses less digits than its factorization.

57936621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19312210.

The product of its digits is 68040, while the sum is 39.

The square root of 57936621 is about 7611.6109333045. The cubic root of 57936621 is about 386.9466171050.

The spelling of 57936621 in words is "fifty-seven million, nine hundred thirty-six thousand, six hundred twenty-one".