57918997 has 2 divisors, whose sum is σ = 57918998. Its totient is φ = 57918996.

The previous prime is 57918989. The next prime is 57919013. The reversal of 57918997 is 79981975.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54081316 + 3837681 = 7354^2 + 1959^2 .

It is a cyclic number.

It is not a de Polignac number, because 57918997 - 2³ = 57918989 is a prime.

It is a super-2 number, since 2×57918997² = 6709220426972018, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57918967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28959498 + 28959499.

It is an arithmetic number, because the mean of its divisors is an integer number (28959499).

Almost surely, 2^57918997 is an apocalyptic number.

It is an amenable number.

57918997 is a deficient number, since it is larger than the sum of its proper divisors (1).

57918997 is an equidigital number, since it uses as much as digits as its factorization.

57918997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1428840, while the sum is 55.

The square root of 57918997 is about 7610.4531402539. The cubic root of 57918997 is about 386.9073774516.

It can be divided in two parts, 5791899 and 7, that added together give a triangular number (5791906 = T₃₄₀₃).

The spelling of 57918997 in words is "fifty-seven million, nine hundred eighteen thousand, nine hundred ninety-seven".