57091379 has 4 divisors (see below), whose sum is σ = 57235584. Its totient is φ = 56947176.

The previous prime is 57091373. The next prime is 57091381. The reversal of 57091379 is 97319075.

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-57091379 is a prime.

It is a super-2 number, since 2×57091379² = 6518851112243282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57091373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71507 + ... + 72300.

It is an arithmetic number, because the mean of its divisors is an integer number (14308896).

Almost surely, 2^57091379 is an apocalyptic number.

57091379 is a deficient number, since it is larger than the sum of its proper divisors (144205).

57091379 is a wasteful number, since it uses less digits than its factorization.

57091379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144204.

The product of its (nonzero) digits is 59535, while the sum is 41.

The square root of 57091379 is about 7555.8837338858. The cubic root of 57091379 is about 385.0556595753.

The spelling of 57091379 in words is "fifty-seven million, ninety-one thousand, three hundred seventy-nine".