57120509 has 2 divisors, whose sum is σ = 57120510. Its totient is φ = 57120508.

The previous prime is 57120439. The next prime is 57120533. The reversal of 57120509 is 90502175.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49308484 + 7812025 = 7022^2 + 2795^2 .

It is a cyclic number.

It is not a de Polignac number, because 57120509 - 2²⁴ = 40343293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57120589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28560254 + 28560255.

It is an arithmetic number, because the mean of its divisors is an integer number (28560255).

Almost surely, 2^57120509 is an apocalyptic number.

It is an amenable number.

57120509 is a deficient number, since it is larger than the sum of its proper divisors (1).

57120509 is an equidigital number, since it uses as much as digits as its factorization.

57120509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3150, while the sum is 29.

The square root of 57120509 is about 7557.8111249223. The cubic root of 57120509 is about 385.1211380205.

The spelling of 57120509 in words is "fifty-seven million, one hundred twenty thousand, five hundred nine".