57072969 has 6 divisors (see below), whose sum is σ = 82438746. Its totient is φ = 38048640.

The previous prime is 57072949. The next prime is 57072973. The reversal of 57072969 is 96927075.

57072969 is a `hidden beast` number, since 570 + 72 + 9 + 6 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 51667344 + 5405625 = 7188^2 + 2325^2 .

It is not a de Polignac number, because 57072969 - 2¹⁵ = 57040201 is a prime.

It is a super-2 number, since 2×57072969² = 6514647580949922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (57072929) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3170712 + ... + 3170729.

It is an arithmetic number, because the mean of its divisors is an integer number (13739791).

Almost surely, 2^57072969 is an apocalyptic number.

It is an amenable number.

57072969 is a deficient number, since it is larger than the sum of its proper divisors (25365777).

57072969 is a wasteful number, since it uses less digits than its factorization.

57072969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6341447 (or 6341444 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The square root of 57072969 is about 7554.6653797504. The cubic root of 57072969 is about 385.0142660706.

The spelling of 57072969 in words is "fifty-seven million, seventy-two thousand, nine hundred sixty-nine".