998768187 has 6 divisors (see below), whose sum is σ = 1442665172. Its totient is φ = 665845452.

The previous prime is 998768179. The next prime is 998768213. The reversal of 998768187 is 781867899.

It is not a de Polignac number, because 998768187 - 2³ = 998768179 is a prime.

It is a super-3 number, since 3×998768187³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998768167) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55487113 + ... + 55487130.

Almost surely, 2^998768187 is an apocalyptic number.

998768187 is a deficient number, since it is larger than the sum of its proper divisors (443896985).

998768187 is a wasteful number, since it uses less digits than its factorization.

998768187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110974249 (or 110974246 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 63.

The square root of 998768187 is about 31603.2939264248. The cubic root of 998768187 is about 999.5892269553.

The spelling of 998768187 in words is "nine hundred ninety-eight million, seven hundred sixty-eight thousand, one hundred eighty-seven".