172980163 has 6 divisors (see below), whose sum is σ = 176741156. Its totient is φ = 169297572.

The previous prime is 172980139. The next prime is 172980193. The reversal of 172980163 is 361089271.

It is not a de Polignac number, because 172980163 - 2¹⁷ = 172849091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172980193) 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 5 ways as a sum of consecutive naturals, for example, 36945 + ... + 41362.

Almost surely, 2^172980163 is an apocalyptic number.

172980163 is a deficient number, since it is larger than the sum of its proper divisors (3760993).

172980163 is an frugal number, since it uses more digits than its factorization.

172980163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78401 (or 78354 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 172980163 is about 13152.1923267568. The cubic root of 172980163 is about 557.1841674669.

The spelling of 172980163 in words is "one hundred seventy-two million, nine hundred eighty thousand, one hundred sixty-three".