87432171 has 16 divisors (see below), whose sum is σ = 117961728. Its totient is φ = 57600000.

The previous prime is 87432133. The next prime is 87432179. The reversal of 87432171 is 17123478.

It is a happy number.

It is not a de Polignac number, because 87432171 - 2¹⁴ = 87415787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87432179) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116046 + ... + 116796.

It is an arithmetic number, because the mean of its divisors is an integer number (7372608).

Almost surely, 2^87432171 is an apocalyptic number.

87432171 is a deficient number, since it is larger than the sum of its proper divisors (30529557).

87432171 is a wasteful number, since it uses less digits than its factorization.

87432171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162.

The product of its digits is 9408, while the sum is 33.

The square root of 87432171 is about 9350.5171514735. The cubic root of 87432171 is about 443.8372557107.

The spelling of 87432171 in words is "eighty-seven million, four hundred thirty-two thousand, one hundred seventy-one".