55988917 has 2 divisors, whose sum is σ = 55988918. Its totient is φ = 55988916.

The previous prime is 55988909. The next prime is 55988941. The reversal of 55988917 is 71988955.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36857041 + 19131876 = 6071^2 + 4374^2 .

It is a cyclic number.

It is not a de Polignac number, because 55988917 - 2³ = 55988909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55988017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27994458 + 27994459.

It is an arithmetic number, because the mean of its divisors is an integer number (27994459).

Almost surely, 2^55988917 is an apocalyptic number.

It is an amenable number.

55988917 is a deficient number, since it is larger than the sum of its proper divisors (1).

55988917 is an equidigital number, since it uses as much as digits as its factorization.

55988917 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 55988917 is about 7482.5742228193. The cubic root of 55988917 is about 382.5609955841.

The spelling of 55988917 in words is "fifty-five million, nine hundred eighty-eight thousand, nine hundred seventeen".