57409591 has 4 divisors (see below), whose sum is σ = 57459384. Its totient is φ = 57359800.

The previous prime is 57409579. The next prime is 57409619. The reversal of 57409591 is 19590475.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 57409591 - 2⁵ = 57409559 is a prime.

It is a super-2 number, since 2×57409591² = 6591722277574562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57409501) 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, 23125 + ... + 25486.

It is an arithmetic number, because the mean of its divisors is an integer number (14364846).

Almost surely, 2^57409591 is an apocalyptic number.

57409591 is a deficient number, since it is larger than the sum of its proper divisors (49793).

57409591 is a wasteful number, since it uses less digits than its factorization.

57409591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49792.

The product of its (nonzero) digits is 56700, while the sum is 40.

The square root of 57409591 is about 7576.9117059657. The cubic root of 57409591 is about 385.7697334424.

The spelling of 57409591 in words is "fifty-seven million, four hundred nine thousand, five hundred ninety-one".