57806689 has 2 divisors, whose sum is σ = 57806690. Its totient is φ = 57806688.

The previous prime is 57806641. The next prime is 57806701. The reversal of 57806689 is 98660875.

57806689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53363025 + 4443664 = 7305^2 + 2108^2 .

It is a cyclic number.

It is not a de Polignac number, because 57806689 - 2⁷ = 57806561 is a prime.

It is a super-2 number, since 2×57806689² = 6683226586285442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (57806629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28903344 + 28903345.

It is an arithmetic number, because the mean of its divisors is an integer number (28903345).

Almost surely, 2^57806689 is an apocalyptic number.

It is an amenable number.

57806689 is a deficient number, since it is larger than the sum of its proper divisors (1).

57806689 is an equidigital number, since it uses as much as digits as its factorization.

57806689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 725760, while the sum is 49.

The square root of 57806689 is about 7603.0710242638. The cubic root of 57806689 is about 386.6571376797.

The spelling of 57806689 in words is "fifty-seven million, eight hundred six thousand, six hundred eighty-nine".