98689999 has 2 divisors, whose sum is σ = 98690000. Its totient is φ = 98689998.

The previous prime is 98689991. The next prime is 98690021. The reversal of 98689999 is 99998689.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 98689999 - 2³ = 98689991 is a prime.

98689999 is a modest number, since divided by 9999 gives 9868 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98689991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49344999 + 49345000.

It is an arithmetic number, because the mean of its divisors is an integer number (49345000).

Almost surely, 2^98689999 is an apocalyptic number.

98689999 is a deficient number, since it is larger than the sum of its proper divisors (1).

98689999 is an equidigital number, since it uses as much as digits as its factorization.

98689999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22674816, while the sum is 67.

The square root of 98689999 is about 9934.2840205019. The cubic root of 98689999 is about 462.1231392182.

The spelling of 98689999 in words is "ninety-eight million, six hundred eighty-nine thousand, nine hundred ninety-nine".