57117997 has 4 divisors (see below), whose sum is σ = 57623580. Its totient is φ = 56612416.

The previous prime is 57117937. The next prime is 57118001. The reversal of 57117997 is 79971175.

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 29387241 + 27730756 = 5421^2 + 5266^2 .

It is a cyclic number.

It is not a de Polignac number, because 57117997 - 2²³ = 48729389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57117937) 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, 252622 + ... + 252847.

It is an arithmetic number, because the mean of its divisors is an integer number (14405895).

Almost surely, 2^57117997 is an apocalyptic number.

It is an amenable number.

57117997 is a deficient number, since it is larger than the sum of its proper divisors (505583).

57117997 is a wasteful number, since it uses less digits than its factorization.

57117997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505582.

The product of its digits is 138915, while the sum is 46.

The square root of 57117997 is about 7557.6449374127. The cubic root of 57117997 is about 385.1154924214.

The spelling of 57117997 in words is "fifty-seven million, one hundred seventeen thousand, nine hundred ninety-seven".