57172889 has 4 divisors (see below), whose sum is σ = 57189924. Its totient is φ = 57155856.

The previous prime is 57172873. The next prime is 57172981. The reversal of 57172889 is 98827175.

57172889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3003289 + 54169600 = 1733^2 + 7360^2 .

It is a cyclic number.

It is not a de Polignac number, because 57172889 - 2⁴ = 57172873 is a prime.

It is a super-3 number, since 3×57172889³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57177889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1622 + ... + 10815.

It is an arithmetic number, because the mean of its divisors is an integer number (14297481).

Almost surely, 2^57172889 is an apocalyptic number.

It is an amenable number.

57172889 is a deficient number, since it is larger than the sum of its proper divisors (17035).

57172889 is a wasteful number, since it uses less digits than its factorization.

57172889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17034.

The product of its digits is 282240, while the sum is 47.

The square root of 57172889 is about 7561.2756198938. The cubic root of 57172889 is about 385.2388218585.

The spelling of 57172889 in words is "fifty-seven million, one hundred seventy-two thousand, eight hundred eighty-nine".