57977861 has 2 divisors, whose sum is σ = 57977862. Its totient is φ = 57977860.

The previous prime is 57977851. The next prime is 57977879. The reversal of 57977861 is 16877975.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54390625 + 3587236 = 7375^2 + 1894^2 .

It is a cyclic number.

It is not a de Polignac number, because 57977861 - 2¹⁰ = 57976837 is a prime.

It is a super-2 number, since 2×57977861² = 6722864732270642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57977831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28988930 + 28988931.

It is an arithmetic number, because the mean of its divisors is an integer number (28988931).

Almost surely, 2^57977861 is an apocalyptic number.

It is an amenable number.

57977861 is a deficient number, since it is larger than the sum of its proper divisors (1).

57977861 is an equidigital number, since it uses as much as digits as its factorization.

57977861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 740880, while the sum is 50.

The square root of 57977861 is about 7614.3194705765. The cubic root of 57977861 is about 387.0384064513.

The spelling of 57977861 in words is "fifty-seven million, nine hundred seventy-seven thousand, eight hundred sixty-one".