981173172 has 48 divisors (see below), whose sum is σ = 2619453312. Its totient is φ = 280014720.

The previous prime is 981173161. The next prime is 981173177. The reversal of 981173172 is 271371189.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 981173172.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981173177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72838 + ... + 85250.

It is an arithmetic number, because the mean of its divisors is an integer number (54571944).

Almost surely, 2^981173172 is an apocalyptic number.

It is an amenable number.

981173172 is an abundant number, since it is smaller than the sum of its proper divisors (1638280140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

981173172 is a wasteful number, since it uses less digits than its factorization.

981173172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13368 (or 13366 counting only the distinct ones).

The product of its digits is 21168, while the sum is 39.

The square root of 981173172 is about 31323.6838829663. The cubic root of 981173172 is about 993.6845902282.

The spelling of 981173172 in words is "nine hundred eighty-one million, one hundred seventy-three thousand, one hundred seventy-two".