998768169 has 48 divisors (see below), whose sum is σ = 1725235200. Its totient is φ = 544392288.

The previous prime is 998768167. The next prime is 998768171. The reversal of 998768169 is 961867899.

It is an interprime number because it is at equal distance from previous prime (998768167) and next prime (998768171).

It is not a de Polignac number, because 998768169 - 2¹ = 998768167 is a prime.

It is a super-2 number, since 2×998768169² = 1995075710815225122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (998768161) 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 47 ways as a sum of consecutive naturals, for example, 693352 + ... + 694790.

It is an arithmetic number, because the mean of its divisors is an integer number (35942400).

Almost surely, 2^998768169 is an apocalyptic number.

It is an amenable number.

998768169 is a deficient number, since it is larger than the sum of its proper divisors (726467031).

998768169 is a wasteful number, since it uses less digits than its factorization.

998768169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1954 (or 1951 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 63.

The square root of 998768169 is about 31603.2936416444. The cubic root of 998768169 is about 999.5892209503.

The spelling of 998768169 in words is "nine hundred ninety-eight million, seven hundred sixty-eight thousand, one hundred sixty-nine".