98979931 has 4 divisors (see below), whose sum is σ = 102172864. Its totient is φ = 95787000.

The previous prime is 98979919. The next prime is 98979941. The reversal of 98979931 is 13997989.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13997989 = 53 ⋅264113.

It is a cyclic number.

It is not a de Polignac number, because 98979931 - 2¹¹ = 98977883 is a prime.

It is a super-2 number, since 2×98979931² = 19594053481529522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (98979901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1596420 + ... + 1596481.

It is an arithmetic number, because the mean of its divisors is an integer number (25543216).

Almost surely, 2^98979931 is an apocalyptic number.

98979931 is a deficient number, since it is larger than the sum of its proper divisors (3192933).

98979931 is a wasteful number, since it uses less digits than its factorization.

98979931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3192932.

The product of its digits is 1102248, while the sum is 55.

The square root of 98979931 is about 9948.8658147550. The cubic root of 98979931 is about 462.5752393786.

The spelling of 98979931 in words is "ninety-eight million, nine hundred seventy-nine thousand, nine hundred thirty-one".