172985589 has 24 divisors (see below), whose sum is σ = 289186560. Its totient is φ = 97594848.

The previous prime is 172985537. The next prime is 172985621. The reversal of 172985589 is 985589271.

It is not a de Polignac number, because 172985589 - 2⁹ = 172985077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172985389) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12402 + ... + 22355.

It is an arithmetic number, because the mean of its divisors is an integer number (12049440).

Almost surely, 2^172985589 is an apocalyptic number.

It is an amenable number.

172985589 is a deficient number, since it is larger than the sum of its proper divisors (116200971).

172985589 is a wasteful number, since it uses less digits than its factorization.

172985589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34849 (or 34846 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 54.

The square root of 172985589 is about 13152.3986025363. The cubic root of 172985589 is about 557.1899932788.

The spelling of 172985589 in words is "one hundred seventy-two million, nine hundred eighty-five thousand, five hundred eighty-nine".