57404993 has 2 divisors, whose sum is σ = 57404994. Its totient is φ = 57404992.

The previous prime is 57404983. The next prime is 57405011. The reversal of 57404993 is 39940475.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36820624 + 20584369 = 6068^2 + 4537^2 .

It is a cyclic number.

It is not a de Polignac number, because 57404993 - 2⁶ = 57404929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57404993.

It is not a weakly prime, because it can be changed into another prime (57404953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28702496 + 28702497.

It is an arithmetic number, because the mean of its divisors is an integer number (28702497).

Almost surely, 2^57404993 is an apocalyptic number.

It is an amenable number.

57404993 is a deficient number, since it is larger than the sum of its proper divisors (1).

57404993 is an equidigital number, since it uses as much as digits as its factorization.

57404993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 57404993 is about 7576.6082781150. The cubic root of 57404993 is about 385.7594342539.

The spelling of 57404993 in words is "fifty-seven million, four hundred four thousand, nine hundred ninety-three".