172980922 has 8 divisors (see below), whose sum is σ = 259528500. Its totient is φ = 86471424.

The previous prime is 172980889. The next prime is 172980971. The reversal of 172980922 is 229089271.

It can be written as a sum of positive squares in 2 ways, for example, as 157778721 + 15202201 = 12561^2 + 3899^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 9204 + ... + 20752.

Almost surely, 2^172980922 is an apocalyptic number.

172980922 is a deficient number, since it is larger than the sum of its proper divisors (86547578).

172980922 is a wasteful number, since it uses less digits than its factorization.

172980922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19040.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 172980922 is about 13152.2211812302. The cubic root of 172980922 is about 557.1849824008.

The spelling of 172980922 in words is "one hundred seventy-two million, nine hundred eighty thousand, nine hundred twenty-two".