57317891 has 8 divisors (see below), whose sum is σ = 60011280. Its totient is φ = 54672352.

The previous prime is 57317881. The next prime is 57317893. The reversal of 57317891 is 19871375.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 57317891 - 2¹⁰ = 57316867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57317893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9500 + ... + 14313.

It is an arithmetic number, because the mean of its divisors is an integer number (7501410).

Almost surely, 2^57317891 is an apocalyptic number.

57317891 is a deficient number, since it is larger than the sum of its proper divisors (2693389).

57317891 is a wasteful number, since it uses less digits than its factorization.

57317891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23925.

The product of its digits is 52920, while the sum is 41.

The square root of 57317891 is about 7570.8580094993. The cubic root of 57317891 is about 385.5642280818.

The spelling of 57317891 in words is "fifty-seven million, three hundred seventeen thousand, eight hundred ninety-one".