172823923 has 8 divisors (see below), whose sum is σ = 179268848. Its totient is φ = 166489344.

The previous prime is 172823899. The next prime is 172823927. The reversal of 172823923 is 329328271.

172823923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 172823923 - 2⁵ = 172823891 is a prime.

It is a super-2 number, since 2×172823923² = 59736216722219858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172823927) 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, 24390 + ... + 30667.

It is an arithmetic number, because the mean of its divisors is an integer number (22408606).

Almost surely, 2^172823923 is an apocalyptic number.

172823923 is a deficient number, since it is larger than the sum of its proper divisors (6444925).

172823923 is an equidigital number, since it uses as much as digits as its factorization.

172823923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55173.

The product of its digits is 36288, while the sum is 37.

The square root of 172823923 is about 13146.2512907673. The cubic root of 172823923 is about 557.0163627201.

It can be divided in two parts, 1728 and 23923, that added together give a triangular number (25651 = T₂₂₆).

The spelling of 172823923 in words is "one hundred seventy-two million, eight hundred twenty-three thousand, nine hundred twenty-three".