57345391 has 2 divisors, whose sum is σ = 57345392. Its totient is φ = 57345390.

The previous prime is 57345373. The next prime is 57345433. The reversal of 57345391 is 19354375.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57345391 - 2¹¹ = 57343343 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57345391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57345331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28672695 + 28672696.

It is an arithmetic number, because the mean of its divisors is an integer number (28672696).

Almost surely, 2^57345391 is an apocalyptic number.

57345391 is a deficient number, since it is larger than the sum of its proper divisors (1).

57345391 is an equidigital number, since it uses as much as digits as its factorization.

57345391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56700, while the sum is 37.

The square root of 57345391 is about 7572.6739663081. The cubic root of 57345391 is about 385.6258802747.

The spelling of 57345391 in words is "fifty-seven million, three hundred forty-five thousand, three hundred ninety-one".