55917889 has 2 divisors, whose sum is σ = 55917890. Its totient is φ = 55917888.

The previous prime is 55917877. The next prime is 55917923. The reversal of 55917889 is 98871955.

55917889 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 can be written as a sum of positive squares in only one way, i.e., 36204289 + 19713600 = 6017^2 + 4440^2 .

It is a cyclic number.

It is not a de Polignac number, because 55917889 - 2⁵ = 55917857 is a prime.

It is not a weakly prime, because it can be changed into another prime (55917839) 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, 27958944 + 27958945.

It is an arithmetic number, because the mean of its divisors is an integer number (27958945).

Almost surely, 2^55917889 is an apocalyptic number.

It is an amenable number.

55917889 is a deficient number, since it is larger than the sum of its proper divisors (1).

55917889 is an equidigital number, since it uses as much as digits as its factorization.

55917889 is an odious number, because the sum of its binary digits is odd.

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

The square root of 55917889 is about 7477.8264890274. The cubic root of 55917889 is about 382.3991537864.

The spelling of 55917889 in words is "fifty-five million, nine hundred seventeen thousand, eight hundred eighty-nine".