57491091 has 24 divisors (see below), whose sum is σ = 95613024. Its totient is φ = 32607360.

The previous prime is 57491023. The next prime is 57491117. The reversal of 57491091 is 19019475.

It is not a de Polignac number, because 57491091 - 2¹¹ = 57489043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57491491) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5301 + ... + 11961.

It is an arithmetic number, because the mean of its divisors is an integer number (3983876).

Almost surely, 2^57491091 is an apocalyptic number.

57491091 is a deficient number, since it is larger than the sum of its proper divisors (38121933).

57491091 is a wasteful number, since it uses less digits than its factorization.

57491091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6811 (or 6808 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The square root of 57491091 is about 7582.2879792316. The cubic root of 57491091 is about 385.9521963763.

The spelling of 57491091 in words is "fifty-seven million, four hundred ninety-one thousand, ninety-one".