57630691 has 2 divisors, whose sum is σ = 57630692. Its totient is φ = 57630690.

The previous prime is 57630689. The next prime is 57630721. The reversal of 57630691 is 19603675.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57630691 - 2¹ = 57630689 is a prime.

Together with 57630689, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 57630691.

It is not a weakly prime, because it can be changed into another prime (57630631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28815345 + 28815346.

It is an arithmetic number, because the mean of its divisors is an integer number (28815346).

Almost surely, 2^57630691 is an apocalyptic number.

57630691 is a deficient number, since it is larger than the sum of its proper divisors (1).

57630691 is an equidigital number, since it uses as much as digits as its factorization.

57630691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 57630691 is about 7591.4880622971. The cubic root of 57630691 is about 386.2643338732.

The spelling of 57630691 in words is "fifty-seven million, six hundred thirty thousand, six hundred ninety-one".