172322123689 has 9 divisors (see below), whose sum is σ = 172862216541. Its totient is φ = 171783716940.

The previous prime is 172322123671. The next prime is 172322123711. The reversal of 172322123689 is 986321223271.

The square root of 172322123689 is 415117.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 172322123689 - 2⁵ = 172322123657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172322123669) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 237031444 + ... + 237032170.

It is an arithmetic number, because the mean of its divisors is an integer number (19206912949).

Almost surely, 2^172322123689 is an apocalyptic number.

172322123689 is the 415117-th square number.

172322123689 is the 207559-th centered octagonal number.

It is an amenable number.

172322123689 is a deficient number, since it is larger than the sum of its proper divisors (540092852).

172322123689 is an frugal number, since it uses more digits than its factorization.

172322123689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2596 (or 1298 counting only the distinct ones).

The product of its digits is 435456, while the sum is 46.

The spelling of 172322123689 in words is "one hundred seventy-two billion, three hundred twenty-two million, one hundred twenty-three thousand, six hundred eighty-nine".