57456439 has 2 divisors, whose sum is σ = 57456440. Its totient is φ = 57456438.

The previous prime is 57456433. The next prime is 57456473. The reversal of 57456439 is 93465475.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57456439 - 2³ = 57456431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 57456395 and 57456404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57456431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28728219 + 28728220.

It is an arithmetic number, because the mean of its divisors is an integer number (28728220).

Almost surely, 2^57456439 is an apocalyptic number.

57456439 is a deficient number, since it is larger than the sum of its proper divisors (1).

57456439 is an equidigital number, since it uses as much as digits as its factorization.

57456439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 453600, while the sum is 43.

The square root of 57456439 is about 7580.0025725589. The cubic root of 57456439 is about 385.8746382528.

The spelling of 57456439 in words is "fifty-seven million, four hundred fifty-six thousand, four hundred thirty-nine".