172639089 has 48 divisors (see below), whose sum is σ = 292481280. Its totient is φ = 96094080.

The previous prime is 172639039. The next prime is 172639091. The reversal of 172639089 is 980936271.

172639089 is a `hidden beast` number, since 1 + 7 + 2 + 639 + 0 + 8 + 9 = 666.

It is not a de Polignac number, because 172639089 - 2²⁰ = 171590513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172639009) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 641647 + ... + 641915.

It is an arithmetic number, because the mean of its divisors is an integer number (6093360).

Almost surely, 2^172639089 is an apocalyptic number.

It is an amenable number.

172639089 is a deficient number, since it is larger than the sum of its proper divisors (119842191).

172639089 is a wasteful number, since it uses less digits than its factorization.

172639089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510 (or 507 counting only the distinct ones).

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

The square root of 172639089 is about 13139.2194973674. The cubic root of 172639089 is about 556.8177168269.

The spelling of 172639089 in words is "one hundred seventy-two million, six hundred thirty-nine thousand, eighty-nine".