172332173 has 6 divisors (see below), whose sum is σ = 186608394. Its totient is φ = 159075696.

The previous prime is 172332157. The next prime is 172332187. The reversal of 172332173 is 371233271.

It can be written as a sum of positive squares in 3 ways, for example, as 6901129 + 165431044 = 2627^2 + 12862^2 .

It is not a de Polignac number, because 172332173 - 2⁴ = 172332157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172332113) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 509690 + ... + 510027.

It is an arithmetic number, because the mean of its divisors is an integer number (31101399).

Almost surely, 2^172332173 is an apocalyptic number.

172332173 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

172332173 is a deficient number, since it is larger than the sum of its proper divisors (14276221).

172332173 is a wasteful number, since it uses less digits than its factorization.

172332173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019743 (or 1019730 counting only the distinct ones).

The product of its digits is 5292, while the sum is 29.

The square root of 172332173 is about 13127.5349171122. The cubic root of 172332173 is about 556.4875528220.

The spelling of 172332173 in words is "one hundred seventy-two million, three hundred thirty-two thousand, one hundred seventy-three".