98997999 has 16 divisors (see below), whose sum is σ = 139680000. Its totient is φ = 62194176.

The previous prime is 98997989. The next prime is 98998007. The reversal of 98997999 is 99979989.

It is not a de Polignac number, because 98997999 - 2⁹ = 98997487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98997979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6502 + ... + 15500.

It is an arithmetic number, because the mean of its divisors is an integer number (8730000).

Almost surely, 2^98997999 is an apocalyptic number.

98997999 is a deficient number, since it is larger than the sum of its proper divisors (40682001).

98997999 is a wasteful number, since it uses less digits than its factorization.

98997999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9214.

The product of its digits is 29760696, while the sum is 69.

The square root of 98997999 is about 9949.7738165247. The cubic root of 98997999 is about 462.6033841444.

The spelling of 98997999 in words is "ninety-eight million, nine hundred ninety-seven thousand, nine hundred ninety-nine".