57961621 has 2 divisors, whose sum is σ = 57961622. Its totient is φ = 57961620.

The previous prime is 57961601. The next prime is 57961637. The reversal of 57961621 is 12616975.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33814225 + 24147396 = 5815^2 + 4914^2 .

It is a cyclic number.

It is not a de Polignac number, because 57961621 - 2⁷ = 57961493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57961601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28980810 + 28980811.

It is an arithmetic number, because the mean of its divisors is an integer number (28980811).

Almost surely, 2^57961621 is an apocalyptic number.

It is an amenable number.

57961621 is a deficient number, since it is larger than the sum of its proper divisors (1).

57961621 is an equidigital number, since it uses as much as digits as its factorization.

57961621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 37.

The square root of 57961621 is about 7613.2529841061. The cubic root of 57961621 is about 387.0022656982.

The spelling of 57961621 in words is "fifty-seven million, nine hundred sixty-one thousand, six hundred twenty-one".