9998931 has 8 divisors (see below), whose sum is σ = 13461760. Its totient is φ = 6601032.

The previous prime is 9998929. The next prime is 9998969. The reversal of 9998931 is 1398999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9998931 - 2¹ = 9998929 is a prime.

It is a super-2 number, since 2×9998931² = 199957242285522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9998971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15871 + ... + 16488.

It is an arithmetic number, because the mean of its divisors is an integer number (1682720).

Almost surely, 2^9998931 is an apocalyptic number.

9998931 is a deficient number, since it is larger than the sum of its proper divisors (3462829).

9998931 is a wasteful number, since it uses less digits than its factorization.

9998931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32465.

The product of its digits is 157464, while the sum is 48.

The square root of 9998931 is about 3162.1086319100. The cubic root of 9998931 is about 215.4357917607.

The spelling of 9998931 in words is "nine million, nine hundred ninety-eight thousand, nine hundred thirty-one".