55905791 has 2 divisors, whose sum is σ = 55905792. Its totient is φ = 55905790.

The previous prime is 55905769. The next prime is 55905821. The reversal of 55905791 is 19750955.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55905791 - 2²² = 51711487 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55905721) 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, 27952895 + 27952896.

It is an arithmetic number, because the mean of its divisors is an integer number (27952896).

Almost surely, 2^55905791 is an apocalyptic number.

55905791 is a deficient number, since it is larger than the sum of its proper divisors (1).

55905791 is an equidigital number, since it uses as much as digits as its factorization.

55905791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70875, while the sum is 41.

The square root of 55905791 is about 7477.0175203754. The cubic root of 55905791 is about 382.3715740696.

The spelling of 55905791 in words is "fifty-five million, nine hundred five thousand, seven hundred ninety-one".