172089369 has 12 divisors (see below), whose sum is σ = 250100656. Its totient is φ = 114021432.

The previous prime is 172089361. The next prime is 172089389. The reversal of 172089369 is 963980271.

It is not a de Polignac number, because 172089369 - 2³ = 172089361 is a prime.

It is a super-2 number, since 2×172089369² = 59229501845636322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172089361) 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, 57187 + ... + 60120.

Almost surely, 2^172089369 is an apocalyptic number.

It is an amenable number.

172089369 is a deficient number, since it is larger than the sum of its proper divisors (78011287).

172089369 is a wasteful number, since it uses less digits than its factorization.

172089369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117476 (or 117473 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 172089369 is about 13118.2837673226. The cubic root of 172089369 is about 556.2260792811.

The spelling of 172089369 in words is "one hundred seventy-two million, eighty-nine thousand, three hundred sixty-nine".