172645089 has 8 divisors (see below), whose sum is σ = 231850080. Its totient is φ = 114268416.

The previous prime is 172645069. The next prime is 172645093. The reversal of 172645089 is 980546271.

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

It is not a de Polignac number, because 172645089 - 2²⁵ = 139090657 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172645089.

It is not an unprimeable number, because it can be changed into a prime (172645049) 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 7 ways as a sum of consecutive naturals, for example, 206592 + ... + 207425.

It is an arithmetic number, because the mean of its divisors is an integer number (28981260).

Almost surely, 2^172645089 is an apocalyptic number.

It is an amenable number.

172645089 is a deficient number, since it is larger than the sum of its proper divisors (59204991).

172645089 is a wasteful number, since it uses less digits than its factorization.

172645089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414159.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 172645089 is about 13139.4478194481. The cubic root of 172645089 is about 556.8241674085.

The spelling of 172645089 in words is "one hundred seventy-two million, six hundred forty-five thousand, eighty-nine".