57918397 has 2 divisors, whose sum is σ = 57918398. Its totient is φ = 57918396.

The previous prime is 57918383. The next prime is 57918461. The reversal of 57918397 is 79381975.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57244356 + 674041 = 7566^2 + 821^2 .

It is a cyclic number.

It is not a de Polignac number, because 57918397 - 2¹¹ = 57916349 is a prime.

It is a super-2 number, since 2×57918397² = 6709081422099218, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 57918397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57918317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28959198 + 28959199.

It is an arithmetic number, because the mean of its divisors is an integer number (28959199).

Almost surely, 2^57918397 is an apocalyptic number.

It is an amenable number.

57918397 is a deficient number, since it is larger than the sum of its proper divisors (1).

57918397 is an equidigital number, since it uses as much as digits as its factorization.

57918397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 476280, while the sum is 49.

The square root of 57918397 is about 7610.4137206856. The cubic root of 57918397 is about 386.9060414177.

The spelling of 57918397 in words is "fifty-seven million, nine hundred eighteen thousand, three hundred ninety-seven".