57303661 has 2 divisors, whose sum is σ = 57303662. Its totient is φ = 57303660.

The previous prime is 57303647. The next prime is 57303667. The reversal of 57303661 is 16630375.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52490025 + 4813636 = 7245^2 + 2194^2 .

It is a cyclic number.

It is not a de Polignac number, because 57303661 - 2⁹ = 57303149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57303667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28651830 + 28651831.

It is an arithmetic number, because the mean of its divisors is an integer number (28651831).

Almost surely, 2^57303661 is an apocalyptic number.

It is an amenable number.

57303661 is a deficient number, since it is larger than the sum of its proper divisors (1).

57303661 is an equidigital number, since it uses as much as digits as its factorization.

57303661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 31.

The square root of 57303661 is about 7569.9181633621. The cubic root of 57303661 is about 385.5323181320.

The spelling of 57303661 in words is "fifty-seven million, three hundred three thousand, six hundred sixty-one".