57192809 has 2 divisors, whose sum is σ = 57192810. Its totient is φ = 57192808.

The previous prime is 57192791. The next prime is 57192829. The reversal of 57192809 is 90829175.

57192809 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., 29735209 + 27457600 = 5453^2 + 5240^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57192809 is a prime.

It is not a weakly prime, because it can be changed into another prime (57192829) 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, 28596404 + 28596405.

It is an arithmetic number, because the mean of its divisors is an integer number (28596405).

Almost surely, 2^57192809 is an apocalyptic number.

It is an amenable number.

57192809 is a deficient number, since it is larger than the sum of its proper divisors (1).

57192809 is an equidigital number, since it uses as much as digits as its factorization.

57192809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 57192809 is about 7562.5927432330. The cubic root of 57192809 is about 385.2835579003.

The spelling of 57192809 in words is "fifty-seven million, one hundred ninety-two thousand, eight hundred nine".