57981881 has 2 divisors, whose sum is σ = 57981882. Its totient is φ = 57981880.

The previous prime is 57981877. The next prime is 57981887. The reversal of 57981881 is 18818975.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53071225 + 4910656 = 7285^2 + 2216^2 .

It is a cyclic number.

It is not a de Polignac number, because 57981881 - 2² = 57981877 is a prime.

It is a super-2 number, since 2×57981881² = 6723797048596322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (57981887) 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, 28990940 + 28990941.

It is an arithmetic number, because the mean of its divisors is an integer number (28990941).

Almost surely, 2^57981881 is an apocalyptic number.

It is an amenable number.

57981881 is a deficient number, since it is larger than the sum of its proper divisors (1).

57981881 is an equidigital number, since it uses as much as digits as its factorization.

57981881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 47.

The square root of 57981881 is about 7614.5834423165. The cubic root of 57981881 is about 387.0473515808.

The spelling of 57981881 in words is "fifty-seven million, nine hundred eighty-one thousand, eight hundred eighty-one".