172272323 has 4 divisors (see below), whose sum is σ = 179762448. Its totient is φ = 164782200.

The previous prime is 172272311. The next prime is 172272329. The reversal of 172272323 is 323272271.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 323272271 = 7 ⋅46181753.

It is a cyclic number.

It is not a de Polignac number, because 172272323 - 2⁴ = 172272307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172272329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3745028 + ... + 3745073.

It is an arithmetic number, because the mean of its divisors is an integer number (44940612).

Almost surely, 2^172272323 is an apocalyptic number.

172272323 is a deficient number, since it is larger than the sum of its proper divisors (7490125).

172272323 is an equidigital number, since it uses as much as digits as its factorization.

172272323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7490124.

The product of its digits is 7056, while the sum is 29.

The square root of 172272323 is about 13125.2551594245. The cubic root of 172272323 is about 556.4231236911.

The spelling of 172272323 in words is "one hundred seventy-two million, two hundred seventy-two thousand, three hundred twenty-three".