57090739 has 4 divisors (see below), whose sum is σ = 57220056. Its totient is φ = 56961424.

The previous prime is 57090707. The next prime is 57090773. The reversal of 57090739 is 93709075.

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 57090739 - 2⁵ = 57090707 is a prime.

It is a super-2 number, since 2×57090739² = 6518704959132242, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57090239) 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, 63994 + ... + 64879.

It is an arithmetic number, because the mean of its divisors is an integer number (14305014).

Almost surely, 2^57090739 is an apocalyptic number.

57090739 is a deficient number, since it is larger than the sum of its proper divisors (129317).

57090739 is a wasteful number, since it uses less digits than its factorization.

57090739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129316.

The product of its (nonzero) digits is 59535, while the sum is 40.

The square root of 57090739 is about 7555.8413826655. The cubic root of 57090739 is about 385.0542207326.

The spelling of 57090739 in words is "fifty-seven million, ninety thousand, seven hundred thirty-nine".