57457409 has 2 divisors, whose sum is σ = 57457410. Its totient is φ = 57457408.

The previous prime is 57457397. The next prime is 57457423. The reversal of 57457409 is 90475475.

57457409 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., 57047809 + 409600 = 7553^2 + 640^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57457409 is a prime.

It is not a weakly prime, because it can be changed into another prime (57457109) 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, 28728704 + 28728705.

It is an arithmetic number, because the mean of its divisors is an integer number (28728705).

Almost surely, 2^57457409 is an apocalyptic number.

It is an amenable number.

57457409 is a deficient number, since it is larger than the sum of its proper divisors (1).

57457409 is an equidigital number, since it uses as much as digits as its factorization.

57457409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 176400, while the sum is 41.

The square root of 57457409 is about 7580.0665564360. The cubic root of 57457409 is about 385.8768097315.

The spelling of 57457409 in words is "fifty-seven million, four hundred fifty-seven thousand, four hundred nine".