57809369 has 2 divisors, whose sum is σ = 57809370. Its totient is φ = 57809368.

The previous prime is 57809351. The next prime is 57809371. The reversal of 57809369 is 96390875.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56625625 + 1183744 = 7525^2 + 1088^2 .

It is a cyclic number.

It is not a de Polignac number, because 57809369 - 2²⁰ = 56760793 is a prime.

It is a super-2 number, since 2×57809369² = 6683846288356322, which contains 22 as substring.

Together with 57809371, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (57809309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28904684 + 28904685.

It is an arithmetic number, because the mean of its divisors is an integer number (28904685).

Almost surely, 2^57809369 is an apocalyptic number.

It is an amenable number.

57809369 is a deficient number, since it is larger than the sum of its proper divisors (1).

57809369 is an equidigital number, since it uses as much as digits as its factorization.

57809369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 57809369 is about 7603.2472667933. The cubic root of 57809369 is about 386.6631129116.

The spelling of 57809369 in words is "fifty-seven million, eight hundred nine thousand, three hundred sixty-nine".