172912323 has 8 divisors (see below), whose sum is σ = 233327808. Its totient is φ = 113885864.

The previous prime is 172912309. The next prime is 172912339. The reversal of 172912323 is 323219271.

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

It is a cyclic number.

It is not a de Polignac number, because 172912323 - 2⁵ = 172912291 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172912343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 346965 + ... + 347462.

It is an arithmetic number, because the mean of its divisors is an integer number (29165976).

Almost surely, 2^172912323 is an apocalyptic number.

172912323 is a deficient number, since it is larger than the sum of its proper divisors (60415485).

172912323 is an equidigital number, since it uses as much as digits as its factorization.

172912323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694513.

The product of its digits is 4536, while the sum is 30.

The square root of 172912323 is about 13149.6130361315. The cubic root of 172912323 is about 557.1113184270. Note that the first 3 decimals are identical.

The spelling of 172912323 in words is "one hundred seventy-two million, nine hundred twelve thousand, three hundred twenty-three".