172268289 has 12 divisors (see below), whose sum is σ = 258048336. Its totient is φ = 114845364.

The previous prime is 172268267. The next prime is 172268297. The reversal of 172268289 is 982862271.

It is not a de Polignac number, because 172268289 - 2¹³ = 172260097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172268989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 354219 + ... + 354704.

It is an arithmetic number, because the mean of its divisors is an integer number (21504028).

Almost surely, 2^172268289 is an apocalyptic number.

It is an amenable number.

172268289 is a deficient number, since it is larger than the sum of its proper divisors (85780047).

172268289 is an frugal number, since it uses more digits than its factorization.

172268289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708938 (or 708926 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 172268289 is about 13125.1014853219. The cubic root of 172268289 is about 556.4187805125.

The spelling of 172268289 in words is "one hundred seventy-two million, two hundred sixty-eight thousand, two hundred eighty-nine".