98989889 has 2 divisors, whose sum is σ = 98989890. Its totient is φ = 98989888.

The previous prime is 98989879. The next prime is 98989903. The reversal of 98989889 is 98898989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60450625 + 38539264 = 7775^2 + 6208^2 .

It is a cyclic number.

It is not a de Polignac number, because 98989889 - 2⁸ = 98989633 is a prime.

It is not a weakly prime, because it can be changed into another prime (98989819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49494944 + 49494945.

It is an arithmetic number, because the mean of its divisors is an integer number (49494945).

Almost surely, 2^98989889 is an apocalyptic number.

It is an amenable number.

98989889 is a deficient number, since it is larger than the sum of its proper divisors (1).

98989889 is an equidigital number, since it uses as much as digits as its factorization.

98989889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26873856, while the sum is 68.

The square root of 98989889 is about 9949.3662612249. The cubic root of 98989889 is about 462.5907515123.

It can be divided in two parts, 9 and 8989889, that added together give a palindrome (8989898).

The spelling of 98989889 in words is "ninety-eight million, nine hundred eighty-nine thousand, eight hundred eighty-nine".