57204409 has 2 divisors, whose sum is σ = 57204410. Its totient is φ = 57204408.

The previous prime is 57204401. The next prime is 57204431. The reversal of 57204409 is 90440275.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52128400 + 5076009 = 7220^2 + 2253^2 .

It is a cyclic number.

It is not a de Polignac number, because 57204409 - 2³ = 57204401 is a prime.

It is not a weakly prime, because it can be changed into another prime (57204401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28602204 + 28602205.

It is an arithmetic number, because the mean of its divisors is an integer number (28602205).

Almost surely, 2^57204409 is an apocalyptic number.

It is an amenable number.

57204409 is a deficient number, since it is larger than the sum of its proper divisors (1).

57204409 is an equidigital number, since it uses as much as digits as its factorization.

57204409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 57204409 is about 7563.3596370925. The cubic root of 57204409 is about 385.3096042234.

The spelling of 57204409 in words is "fifty-seven million, two hundred four thousand, four hundred nine".