57805691 has 2 divisors, whose sum is σ = 57805692. Its totient is φ = 57805690.

The previous prime is 57805651. The next prime is 57805697. The reversal of 57805691 is 19650875.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57805691 is a prime.

It is not a weakly prime, because it can be changed into another prime (57805697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28902845 + 28902846.

It is an arithmetic number, because the mean of its divisors is an integer number (28902846).

Almost surely, 2^57805691 is an apocalyptic number.

57805691 is a deficient number, since it is larger than the sum of its proper divisors (1).

57805691 is an equidigital number, since it uses as much as digits as its factorization.

57805691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 41.

The square root of 57805691 is about 7603.0053926063. The cubic root of 57805691 is about 386.6549125275.

The spelling of 57805691 in words is "fifty-seven million, eight hundred five thousand, six hundred ninety-one".