172487889 has 36 divisors (see below), whose sum is σ = 293554560. Its totient is φ = 97297200.

The previous prime is 172487873. The next prime is 172487891. The reversal of 172487889 is 988784271.

It is a happy number.

It is not a de Polignac number, because 172487889 - 2⁴ = 172487873 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172487839) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 32364 + ... + 37314.

Almost surely, 2^172487889 is an apocalyptic number.

It is an amenable number.

172487889 is a deficient number, since it is larger than the sum of its proper divisors (121066671).

172487889 is a wasteful number, since it uses less digits than its factorization.

172487889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5050 (or 5040 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 54.

The square root of 172487889 is about 13133.4644705805. The cubic root of 172487889 is about 556.6551128076.

The spelling of 172487889 in words is "one hundred seventy-two million, four hundred eighty-seven thousand, eight hundred eighty-nine".