57913621 has 4 divisors (see below), whose sum is σ = 59478892. Its totient is φ = 56348352.

The previous prime is 57913613. The next prime is 57913627. The reversal of 57913621 is 12631975.

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

It can be written as a sum of positive squares in 2 ways, for example, as 51638596 + 6275025 = 7186^2 + 2505^2 .

It is a cyclic number.

It is not a de Polignac number, because 57913621 - 2³ = 57913613 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 (57913627) 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, 782580 + ... + 782653.

It is an arithmetic number, because the mean of its divisors is an integer number (14869723).

Almost surely, 2^57913621 is an apocalyptic number.

It is an amenable number.

57913621 is a deficient number, since it is larger than the sum of its proper divisors (1565271).

57913621 is a wasteful number, since it uses less digits than its factorization.

57913621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1565270.

The product of its digits is 11340, while the sum is 34.

The square root of 57913621 is about 7610.0999336408. The cubic root of 57913621 is about 386.8954062589.

The spelling of 57913621 in words is "fifty-seven million, nine hundred thirteen thousand, six hundred twenty-one".