998173131 has 8 divisors (see below), whose sum is σ = 1331499840. Its totient is φ = 665147592.

The previous prime is 998173129. The next prime is 998173133. The reversal of 998173131 is 131371899.

It is an interprime number because it is at equal distance from previous prime (998173129) and next prime (998173133).

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

It is not a de Polignac number, because 998173131 - 2¹ = 998173129 is a prime.

It is a super-2 number, since 2×998173131² = 1992699198900686322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (998173133) 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, 67441 + ... + 80898.

It is an arithmetic number, because the mean of its divisors is an integer number (166437480).

Almost surely, 2^998173131 is an apocalyptic number.

998173131 is a deficient number, since it is larger than the sum of its proper divisors (333326709).

998173131 is a wasteful number, since it uses less digits than its factorization.

998173131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150585.

The product of its digits is 40824, while the sum is 42.

The square root of 998173131 is about 31593.8780620550. The cubic root of 998173131 is about 999.3906724620.

The spelling of 998173131 in words is "nine hundred ninety-eight million, one hundred seventy-three thousand, one hundred thirty-one".