57400091 has 4 divisors (see below), whose sum is σ = 65600112. Its totient is φ = 49200072.

The previous prime is 57400081. The next prime is 57400093. The reversal of 57400091 is 19000475.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57400091 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57400091.

It is not an unprimeable number, because it can be changed into a prime (57400093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4100000 + ... + 4100013.

It is an arithmetic number, because the mean of its divisors is an integer number (16400028).

Almost surely, 2^57400091 is an apocalyptic number.

57400091 is a deficient number, since it is larger than the sum of its proper divisors (8200021).

57400091 is an equidigital number, since it uses as much as digits as its factorization.

57400091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8200020.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 57400091 is about 7576.2847755348. The cubic root of 57400091 is about 385.7484535217.

The spelling of 57400091 in words is "fifty-seven million, four hundred thousand, ninety-one".