998208929667 has 18 divisors (see below), whose sum is σ = 1334538192036. Its totient is φ = 663680976480.

The previous prime is 998208929659. The next prime is 998208929687. The reversal of 998208929667 is 766929802899.

It is not a de Polignac number, because 998208929667 - 2³ = 998208929659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (998208929657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1060795417 + ... + 1060796357.

Almost surely, 2^998208929667 is an apocalyptic number.

998208929667 is a deficient number, since it is larger than the sum of its proper divisors (336329262369).

998208929667 is an frugal number, since it uses more digits than its factorization.

998208929667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3111 (or 1557 counting only the distinct ones).

The product of its (nonzero) digits is 423263232, while the sum is 75.

Multiplying 998208929667 by its sum of digits (75), we get a square (74865669725025 = 8652495²).

The spelling of 998208929667 in words is "nine hundred ninety-eight billion, two hundred eight million, nine hundred twenty-nine thousand, six hundred sixty-seven".