98999979 has 16 divisors (see below), whose sum is σ = 143103744. Its totient is φ = 60516000.

The previous prime is 98999977. The next prime is 98999983. The reversal of 98999979 is 97999989.

It is not a de Polignac number, because 98999979 - 2¹ = 98999977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (98999977) 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 in 15 ways as a sum of consecutive naturals, for example, 2517 + ... + 14294.

It is an arithmetic number, because the mean of its divisors is an integer number (8943984).

Almost surely, 2^98999979 is an apocalyptic number.

98999979 is a deficient number, since it is larger than the sum of its proper divisors (44103765).

98999979 is a wasteful number, since it uses less digits than its factorization.

98999979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16978.

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

The square root of 98999979 is about 9949.8733157764. The cubic root of 98999979 is about 462.6064682087.

The spelling of 98999979 in words is "ninety-eight million, nine hundred ninety-nine thousand, nine hundred seventy-nine".