55988899 has 2 divisors, whose sum is σ = 55988900. Its totient is φ = 55988898.

The previous prime is 55988893. The next prime is 55988909. The reversal of 55988899 is 99888955.

55988899 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55988899 is a prime.

It is a super-2 number, since 2×55988899² = 6269513622464402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55988893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27994449 + 27994450.

It is an arithmetic number, because the mean of its divisors is an integer number (27994450).

Almost surely, 2^55988899 is an apocalyptic number.

55988899 is a deficient number, since it is larger than the sum of its proper divisors (1).

55988899 is an equidigital number, since it uses as much as digits as its factorization.

55988899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9331200, while the sum is 61.

The square root of 55988899 is about 7482.5730200246. The cubic root of 55988899 is about 382.5609545873.

The spelling of 55988899 in words is "fifty-five million, nine hundred eighty-eight thousand, eight hundred ninety-nine".