57088739 has 4 divisors (see below), whose sum is σ = 57170880. Its totient is φ = 57006600.

The previous prime is 57088729. The next prime is 57088747. The reversal of 57088739 is 93788075.

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-57088739 is a prime.

It is a super-2 number, since 2×57088739² = 6518248241220242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 57088693 and 57088702.

It is not an unprimeable number, because it can be changed into a prime (57088709) 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, 40019 + ... + 41420.

It is an arithmetic number, because the mean of its divisors is an integer number (14292720).

Almost surely, 2^57088739 is an apocalyptic number.

57088739 is a deficient number, since it is larger than the sum of its proper divisors (82141).

57088739 is an equidigital number, since it uses as much as digits as its factorization.

57088739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82140.

The product of its (nonzero) digits is 423360, while the sum is 47.

The square root of 57088739 is about 7555.7090335719. The cubic root of 57088739 is about 385.0497242798.

The spelling of 57088739 in words is "fifty-seven million, eighty-eight thousand, seven hundred thirty-nine".