172380971 has 12 divisors (see below), whose sum is σ = 203353200. Its totient is φ = 145671120.

The previous prime is 172380947. The next prime is 172381019. The reversal of 172380971 is 179083271.

It is not a de Polignac number, because 172380971 - 2¹⁰ = 172379947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172380071) 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 11 ways as a sum of consecutive naturals, for example, 21296 + ... + 28253.

It is an arithmetic number, because the mean of its divisors is an integer number (16946100).

Almost surely, 2^172380971 is an apocalyptic number.

172380971 is a deficient number, since it is larger than the sum of its proper divisors (30972229).

172380971 is an equidigital number, since it uses as much as digits as its factorization.

172380971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49634 (or 49627 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 172380971 is about 13129.3933980211. The cubic root of 172380971 is about 556.5400733243.

The spelling of 172380971 in words is "one hundred seventy-two million, three hundred eighty thousand, nine hundred seventy-one".