172290489 has 16 divisors (see below), whose sum is σ = 262871040. Its totient is φ = 98326800.

The previous prime is 172290431. The next prime is 172290509. The reversal of 172290489 is 984092271.

172290489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 172290489 - 2²⁴ = 155513273 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172290489.

It is not an unprimeable number, because it can be changed into a prime (172290589) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13264 + ... + 22814.

It is an arithmetic number, because the mean of its divisors is an integer number (16429440).

Almost surely, 2^172290489 is an apocalyptic number.

It is an amenable number.

172290489 is a deficient number, since it is larger than the sum of its proper divisors (90580551).

172290489 is an equidigital number, since it uses as much as digits as its factorization.

172290489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10420.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 172290489 is about 13125.9471658239. The cubic root of 172290489 is about 556.4426811511.

The spelling of 172290489 in words is "one hundred seventy-two million, two hundred ninety thousand, four hundred eighty-nine".