998172874 has 16 divisors (see below), whose sum is σ = 1516112136. Its totient is φ = 492825600.

The previous prime is 998172871. The next prime is 998172911. The reversal of 998172874 is 478271899.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 455609025 + 542563849 = 21345^2 + 23293^2 .

It is not an unprimeable number, because it can be changed into a prime (998172871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83854 + ... + 95014.

Almost surely, 2^998172874 is an apocalyptic number.

998172874 is a deficient number, since it is larger than the sum of its proper divisors (517939262).

998172874 is a wasteful number, since it uses less digits than its factorization.

998172874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11721.

The product of its digits is 2032128, while the sum is 55.

The square root of 998172874 is about 31593.8739948111. The cubic root of 998172874 is about 999.3905866909.

The spelling of 998172874 in words is "nine hundred ninety-eight million, one hundred seventy-two thousand, eight hundred seventy-four".