172080689 has 4 divisors (see below), whose sum is σ = 187724400. Its totient is φ = 156436980.

The previous prime is 172080679. The next prime is 172080691. The reversal of 172080689 is 986080271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172080689 is a prime.

It is a super-2 number, since 2×172080689² = 59223527053429442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172080679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7821839 + ... + 7821860.

It is an arithmetic number, because the mean of its divisors is an integer number (46931100).

Almost surely, 2^172080689 is an apocalyptic number.

It is an amenable number.

172080689 is a deficient number, since it is larger than the sum of its proper divisors (15643711).

172080689 is a wasteful number, since it uses less digits than its factorization.

172080689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15643710.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 172080689 is about 13117.9529271910. The cubic root of 172080689 is about 556.2167273117.

The spelling of 172080689 in words is "one hundred seventy-two million, eighty thousand, six hundred eighty-nine".