57069209 has 2 divisors, whose sum is σ = 57069210. Its totient is φ = 57069208.

The previous prime is 57069197. The next prime is 57069251. The reversal of 57069209 is 90296075.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36638809 + 20430400 = 6053^2 + 4520^2 .

It is a cyclic number.

It is not a de Polignac number, because 57069209 - 2⁸ = 57068953 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (57069269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28534604 + 28534605.

It is an arithmetic number, because the mean of its divisors is an integer number (28534605).

Almost surely, 2^57069209 is an apocalyptic number.

It is an amenable number.

57069209 is a deficient number, since it is larger than the sum of its proper divisors (1).

57069209 is an equidigital number, since it uses as much as digits as its factorization.

57069209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 57069209 is about 7554.4165228031. The cubic root of 57069209 is about 385.0058108978.

The spelling of 57069209 in words is "fifty-seven million, sixty-nine thousand, two hundred nine".