57420689 has 2 divisors, whose sum is σ = 57420690. Its totient is φ = 57420688.

The previous prime is 57420661. The next prime is 57420731. The reversal of 57420689 is 98602475.

57420689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56370064 + 1050625 = 7508^2 + 1025^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57420689 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (57420659) 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, 28710344 + 28710345.

It is an arithmetic number, because the mean of its divisors is an integer number (28710345).

Almost surely, 2^57420689 is an apocalyptic number.

It is an amenable number.

57420689 is a deficient number, since it is larger than the sum of its proper divisors (1).

57420689 is an equidigital number, since it uses as much as digits as its factorization.

57420689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 57420689 is about 7577.6440270047. The cubic root of 57420689 is about 385.7945898969.

The spelling of 57420689 in words is "fifty-seven million, four hundred twenty thousand, six hundred eighty-nine".