57456869 has 2 divisors, whose sum is σ = 57456870. Its totient is φ = 57456868.

The previous prime is 57456863. The next prime is 57456871. The reversal of 57456869 is 96865475.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37761025 + 19695844 = 6145^2 + 4438^2 .

It is a cyclic number.

It is not a de Polignac number, because 57456869 - 2⁴ = 57456853 is a prime.

It is a super-2 number, since 2×57456869² = 6602583590566322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 57456871, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57456863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28728434 + 28728435.

It is an arithmetic number, because the mean of its divisors is an integer number (28728435).

Almost surely, 2^57456869 is an apocalyptic number.

It is an amenable number.

57456869 is a deficient number, since it is larger than the sum of its proper divisors (1).

57456869 is an equidigital number, since it uses as much as digits as its factorization.

57456869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1814400, while the sum is 50.

The square root of 57456869 is about 7580.0309366123. The cubic root of 57456869 is about 385.8756008701.

The spelling of 57456869 in words is "fifty-seven million, four hundred fifty-six thousand, eight hundred sixty-nine".