990169173 has 96 divisors (see below), whose sum is σ = 1795788800. Its totient is φ = 513122688.

The previous prime is 990169151. The next prime is 990169177. The reversal of 990169173 is 371961099.

It is not a de Polignac number, because 990169173 - 2⁹ = 990168661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990169177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3498690 + ... + 3498972.

Almost surely, 2^990169173 is an apocalyptic number.

It is an amenable number.

990169173 is a deficient number, since it is larger than the sum of its proper divisors (805619627).

990169173 is a wasteful number, since it uses less digits than its factorization.

990169173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431 (or 428 counting only the distinct ones).

The product of its (nonzero) digits is 91854, while the sum is 45.

The square root of 990169173 is about 31466.9536657110. The cubic root of 990169173 is about 996.7122602802.

The spelling of 990169173 in words is "nine hundred ninety million, one hundred sixty-nine thousand, one hundred seventy-three".