172732370323 has 4 divisors (see below), whose sum is σ = 172829249488. Its totient is φ = 172635491160.

The previous prime is 172732370309. The next prime is 172732370347. The reversal of 172732370323 is 323073237271.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 172732370323 - 2⁹ = 172732369811 is a prime.

It is a super-2 number, since 2×172732370323² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172732370423) 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, 48436908 + ... + 48440473.

It is an arithmetic number, because the mean of its divisors is an integer number (43207312372).

Almost surely, 2^172732370323 is an apocalyptic number.

172732370323 is a deficient number, since it is larger than the sum of its proper divisors (96879165).

172732370323 is an equidigital number, since it uses as much as digits as its factorization.

172732370323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96879164.

The product of its (nonzero) digits is 222264, while the sum is 40.

The spelling of 172732370323 in words is "one hundred seventy-two billion, seven hundred thirty-two million, three hundred seventy thousand, three hundred twenty-three".