98978931 has 24 divisors (see below), whose sum is σ = 148178160. Its totient is φ = 63625536.

The previous prime is 98978927. The next prime is 98978933. The reversal of 98978931 is 13987989.

It is not a de Polignac number, because 98978931 - 2² = 98978927 is a prime.

It is a super-2 number, since 2×98978931² = 19593657563805522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (98978933) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26385 + ... + 29901.

It is an arithmetic number, because the mean of its divisors is an integer number (6174090).

Almost surely, 2^98978931 is an apocalyptic number.

98978931 is a deficient number, since it is larger than the sum of its proper divisors (49199229).

98978931 is a wasteful number, since it uses less digits than its factorization.

98978931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3635 (or 3632 counting only the distinct ones).

The product of its digits is 979776, while the sum is 54.

The square root of 98978931 is about 9948.8155576430. The cubic root of 98978931 is about 462.5736815652.

The spelling of 98978931 in words is "ninety-eight million, nine hundred seventy-eight thousand, nine hundred thirty-one".