57107509 has 2 divisors, whose sum is σ = 57107510. Its totient is φ = 57107508.

The previous prime is 57107507. The next prime is 57107513. The reversal of 57107509 is 90570175.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56205009 + 902500 = 7497^2 + 950^2 .

It is a cyclic number.

It is not a de Polignac number, because 57107509 - 2¹ = 57107507 is a prime.

It is a super-2 number, since 2×57107509² = 6522535168370162, which contains 22 as substring.

Together with 57107507, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57107503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28553754 + 28553755.

It is an arithmetic number, because the mean of its divisors is an integer number (28553755).

Almost surely, 2^57107509 is an apocalyptic number.

It is an amenable number.

57107509 is a deficient number, since it is larger than the sum of its proper divisors (1).

57107509 is an equidigital number, since it uses as much as digits as its factorization.

57107509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11025, while the sum is 34.

The square root of 57107509 is about 7556.9510386134. The cubic root of 57107509 is about 385.0919193578.

The spelling of 57107509 in words is "fifty-seven million, one hundred seven thousand, five hundred nine".