55988791 has 2 divisors, whose sum is σ = 55988792. Its totient is φ = 55988790.

The previous prime is 55988773. The next prime is 55988809. The reversal of 55988791 is 19788955.

It is a balanced prime because it is at equal distance from previous prime (55988773) and next prime (55988809).

It is a cyclic number.

It is not a de Polignac number, because 55988791 - 2⁷ = 55988663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55988711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27994395 + 27994396.

It is an arithmetic number, because the mean of its divisors is an integer number (27994396).

Almost surely, 2^55988791 is an apocalyptic number.

55988791 is a deficient number, since it is larger than the sum of its proper divisors (1).

55988791 is an equidigital number, since it uses as much as digits as its factorization.

55988791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 907200, while the sum is 52.

The square root of 55988791 is about 7482.5658032523. The cubic root of 55988791 is about 382.5607086064.

The spelling of 55988791 in words is "fifty-five million, nine hundred eighty-eight thousand, seven hundred ninety-one".