172289871 has 24 divisors (see below), whose sum is σ = 275256800. Its totient is φ = 103156416.

The previous prime is 172289861. The next prime is 172289879. The reversal of 172289871 is 178982271.

It is not a de Polignac number, because 172289871 - 2¹⁴ = 172273487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172289879) 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, 15571 + ... + 24228.

Almost surely, 2^172289871 is an apocalyptic number.

172289871 is a deficient number, since it is larger than the sum of its proper divisors (102966929).

172289871 is a wasteful number, since it uses less digits than its factorization.

172289871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39855 (or 39852 counting only the distinct ones).

The product of its digits is 112896, while the sum is 45.

The square root of 172289871 is about 13125.9236246445. The cubic root of 172289871 is about 556.4420158368.

The spelling of 172289871 in words is "one hundred seventy-two million, two hundred eighty-nine thousand, eight hundred seventy-one".