57611791 has 2 divisors, whose sum is σ = 57611792. Its totient is φ = 57611790.

The previous prime is 57611783. The next prime is 57611797. The reversal of 57611791 is 19711675.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57611791 - 2³ = 57611783 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57611791.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57611797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28805895 + 28805896.

It is an arithmetic number, because the mean of its divisors is an integer number (28805896).

Almost surely, 2^57611791 is an apocalyptic number.

57611791 is a deficient number, since it is larger than the sum of its proper divisors (1).

57611791 is an equidigital number, since it uses as much as digits as its factorization.

57611791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13230, while the sum is 37.

The square root of 57611791 is about 7590.2431449855. The cubic root of 57611791 is about 386.2221040937. Note that the first 3 decimals are identical.

The spelling of 57611791 in words is "fifty-seven million, six hundred eleven thousand, seven hundred ninety-one".