57323991 has 8 divisors (see below), whose sum is σ = 78897664. Its totient is φ = 36983160.

The previous prime is 57323953. The next prime is 57323999. The reversal of 57323991 is 19932375.

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

It is not a de Polignac number, because 57323991 - 2⁹ = 57323479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57323999) 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, 308101 + ... + 308286.

It is an arithmetic number, because the mean of its divisors is an integer number (9862208).

Almost surely, 2^57323991 is an apocalyptic number.

57323991 is a deficient number, since it is larger than the sum of its proper divisors (21573673).

57323991 is a wasteful number, since it uses less digits than its factorization.

57323991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616421.

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

The square root of 57323991 is about 7571.2608593285. The cubic root of 57323991 is about 385.5779053608.

The spelling of 57323991 in words is "fifty-seven million, three hundred twenty-three thousand, nine hundred ninety-one".