172928871 has 8 divisors (see below), whose sum is σ = 256190960. Its totient is φ = 115285896.

The previous prime is 172928851. The next prime is 172928887. The reversal of 172928871 is 178829271.

It is not a de Polignac number, because 172928871 - 2⁹ = 172928359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172928801) 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 7 ways as a sum of consecutive naturals, for example, 3202360 + ... + 3202413.

It is an arithmetic number, because the mean of its divisors is an integer number (32023870).

Almost surely, 2^172928871 is an apocalyptic number.

172928871 is a deficient number, since it is larger than the sum of its proper divisors (83262089).

172928871 is an equidigital number, since it uses as much as digits as its factorization.

172928871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6404782 (or 6404776 counting only the distinct ones).

The product of its digits is 112896, while the sum is 45.

The square root of 172928871 is about 13150.2422411148. The cubic root of 172928871 is about 557.1290900233.

The spelling of 172928871 in words is "one hundred seventy-two million, nine hundred twenty-eight thousand, eight hundred seventy-one".