57457993 has 4 divisors (see below), whose sum is σ = 57478608. Its totient is φ = 57437380.

The previous prime is 57457969. The next prime is 57457997. The reversal of 57457993 is 39975475.

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 57457993 - 2⁹ = 57457481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57457997) 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, 5323 + ... + 11968.

It is an arithmetic number, because the mean of its divisors is an integer number (14369652).

Almost surely, 2^57457993 is an apocalyptic number.

It is an amenable number.

57457993 is a deficient number, since it is larger than the sum of its proper divisors (20615).

57457993 is a wasteful number, since it uses less digits than its factorization.

57457993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20614.

The product of its digits is 1190700, while the sum is 49.

The square root of 57457993 is about 7580.1050784273. The cubic root of 57457993 is about 385.8781170841.

The spelling of 57457993 in words is "fifty-seven million, four hundred fifty-seven thousand, nine hundred ninety-three".