57873209 has 2 divisors, whose sum is σ = 57873210. Its totient is φ = 57873208.

The previous prime is 57873199. The next prime is 57873247. The reversal of 57873209 is 90237875.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57805609 + 67600 = 7603^2 + 260^2 .

It is a cyclic number.

It is not a de Polignac number, because 57873209 - 2²⁰ = 56824633 is a prime.

It is not a weakly prime, because it can be changed into another prime (57873269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28936604 + 28936605.

It is an arithmetic number, because the mean of its divisors is an integer number (28936605).

Almost surely, 2^57873209 is an apocalyptic number.

It is an amenable number.

57873209 is a deficient number, since it is larger than the sum of its proper divisors (1).

57873209 is an equidigital number, since it uses as much as digits as its factorization.

57873209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 57873209 is about 7607.4443146171. Note that the first 3 decimals coincide. The cubic root of 57873209 is about 386.8053937251.

The spelling of 57873209 in words is "fifty-seven million, eight hundred seventy-three thousand, two hundred nine".