57981457 has 2 divisors, whose sum is σ = 57981458. Its totient is φ = 57981456.

The previous prime is 57981449. The next prime is 57981461. The reversal of 57981457 is 75418975.

It is a happy number.

57981457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33686416 + 24295041 = 5804^2 + 4929^2 .

It is a cyclic number.

It is not a de Polignac number, because 57981457 - 2³ = 57981449 is a prime.

It is not a weakly prime, because it can be changed into another prime (57981437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28990728 + 28990729.

It is an arithmetic number, because the mean of its divisors is an integer number (28990729).

Almost surely, 2^57981457 is an apocalyptic number.

It is an amenable number.

57981457 is a deficient number, since it is larger than the sum of its proper divisors (1).

57981457 is an equidigital number, since it uses as much as digits as its factorization.

57981457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 352800, while the sum is 46.

The square root of 57981457 is about 7614.5556009527. Note that the first 3 decimals coincide. The cubic root of 57981457 is about 387.0464081339.

The spelling of 57981457 in words is "fifty-seven million, nine hundred eighty-one thousand, four hundred fifty-seven".