9998131 has 16 divisors (see below), whose sum is σ = 11854080. Its totient is φ = 8313120.

The previous prime is 9998129. The next prime is 9998141. The reversal of 9998131 is 1318999.

9998131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 9998131 - 2¹ = 9998129 is a prime.

It is a super-2 number, since 2×9998131² = 199925246986322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9998141) 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, 19626 + ... + 20128.

It is an arithmetic number, because the mean of its divisors is an integer number (740880).

Almost surely, 2^9998131 is an apocalyptic number.

9998131 is a deficient number, since it is larger than the sum of its proper divisors (1855949).

9998131 is a wasteful number, since it uses less digits than its factorization.

9998131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666.

The product of its digits is 17496, while the sum is 40.

The square root of 9998131 is about 3161.9821315118. The cubic root of 9998131 is about 215.4300460388.

The spelling of 9998131 in words is "nine million, nine hundred ninety-eight thousand, one hundred thirty-one".