57688621 has 2 divisors, whose sum is σ = 57688622. Its totient is φ = 57688620.

The previous prime is 57688597. The next prime is 57688637. The reversal of 57688621 is 12688675.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43164900 + 14523721 = 6570^2 + 3811^2 .

It is a cyclic number.

It is not a de Polignac number, because 57688621 - 2²⁵ = 24134189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57688651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28844310 + 28844311.

It is an arithmetic number, because the mean of its divisors is an integer number (28844311).

Almost surely, 2^57688621 is an apocalyptic number.

It is an amenable number.

57688621 is a deficient number, since it is larger than the sum of its proper divisors (1).

57688621 is an equidigital number, since it uses as much as digits as its factorization.

57688621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 43.

The square root of 57688621 is about 7595.3025614520. The cubic root of 57688621 is about 386.3937140070.

The spelling of 57688621 in words is "fifty-seven million, six hundred eighty-eight thousand, six hundred twenty-one".