172432438989 has 8 divisors (see below), whose sum is σ = 229931382432. Its totient is φ = 114944227440.

The previous prime is 172432438973. The next prime is 172432439009. The reversal of 172432438989 is 989834234271.

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

It is not a de Polignac number, because 172432438989 - 2⁴ = 172432438973 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172432438939) 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, 2645407 + ... + 2709804.

It is an arithmetic number, because the mean of its divisors is an integer number (28741422804).

Almost surely, 2^172432438989 is an apocalyptic number.

It is an amenable number.

172432438989 is a deficient number, since it is larger than the sum of its proper divisors (57498943443).

172432438989 is a wasteful number, since it uses less digits than its factorization.

172432438989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5365947.

The product of its digits is 20901888, while the sum is 60.

The spelling of 172432438989 in words is "one hundred seventy-two billion, four hundred thirty-two million, four hundred thirty-eight thousand, nine hundred eighty-nine".