57477993 has 4 divisors (see below), whose sum is σ = 76637328. Its totient is φ = 38318660.

The previous prime is 57477967. The next prime is 57478007. The reversal of 57477993 is 39977475.

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 57477993 - 2⁶ = 57477929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57477293) 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, 9579663 + ... + 9579668.

It is an arithmetic number, because the mean of its divisors is an integer number (19159332).

Almost surely, 2^57477993 is an apocalyptic number.

It is an amenable number.

57477993 is a deficient number, since it is larger than the sum of its proper divisors (19159335).

57477993 is a wasteful number, since it uses less digits than its factorization.

57477993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19159334.

The product of its digits is 1666980, while the sum is 51.

The square root of 57477993 is about 7581.4242065723. The cubic root of 57477993 is about 385.9228840908.

The spelling of 57477993 in words is "fifty-seven million, four hundred seventy-seven thousand, nine hundred ninety-three".