57291393 has 4 divisors (see below), whose sum is σ = 76388528. Its totient is φ = 38194260.

The previous prime is 57291371. The next prime is 57291397. The reversal of 57291393 is 39319275.

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 57291393 - 2⁶ = 57291329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57291397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9548563 + ... + 9548568.

It is an arithmetic number, because the mean of its divisors is an integer number (19097132).

Almost surely, 2^57291393 is an apocalyptic number.

It is an amenable number.

57291393 is a deficient number, since it is larger than the sum of its proper divisors (19097135).

57291393 is a wasteful number, since it uses less digits than its factorization.

57291393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19097134.

The product of its digits is 51030, while the sum is 39.

The square root of 57291393 is about 7569.1078073971. The cubic root of 57291393 is about 385.5048036128.

The spelling of 57291393 in words is "fifty-seven million, two hundred ninety-one thousand, three hundred ninety-three".