57198969 has 9 divisors (see below), whose sum is σ = 82653519. Its totient is φ = 38117520.

The previous prime is 57198959. The next prime is 57198971. The reversal of 57198969 is 96989175.

The square root of 57198969 is 7563.

It is a perfect power (a square), and thus also a powerful number.

57198969 is a `hidden beast` number, since 571 + 9 + 8 + 9 + 69 = 666.

It can be written as a sum of positive squares in only one way, i.e., 45369 + 57153600 = 213^2 + 7560^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 57198969 - 2⁹ = 57198457 is a prime.

It is a super-2 number, since 2×57198969² = 6543444109325922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (57198919) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 21429 + ... + 23949.

Almost surely, 2^57198969 is an apocalyptic number.

57198969 is the 7563-rd square number.

57198969 is the 3782-nd centered octagonal number.

It is an amenable number.

57198969 is a deficient number, since it is larger than the sum of its proper divisors (25454550).

57198969 is an frugal number, since it uses more digits than its factorization.

57198969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5048 (or 2524 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 54.

The cubic root of 57198969 is about 385.2973898345.

The spelling of 57198969 in words is "fifty-seven million, one hundred ninety-eight thousand, nine hundred sixty-nine".