57438791 has 2 divisors, whose sum is σ = 57438792. Its totient is φ = 57438790.

The previous prime is 57438737. The next prime is 57438793. The reversal of 57438791 is 19783475.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57438791 - 2¹⁰ = 57437767 is a prime.

It is a Sophie Germain prime.

Together with 57438793, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57438793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28719395 + 28719396.

It is an arithmetic number, because the mean of its divisors is an integer number (28719396).

Almost surely, 2^57438791 is an apocalyptic number.

57438791 is a deficient number, since it is larger than the sum of its proper divisors (1).

57438791 is an equidigital number, since it uses as much as digits as its factorization.

57438791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 44.

The square root of 57438791 is about 7578.8383674545. The cubic root of 57438791 is about 385.8351265051.

The spelling of 57438791 in words is "fifty-seven million, four hundred thirty-eight thousand, seven hundred ninety-one".