87229171 has 4 divisors (see below), whose sum is σ = 91820200. Its totient is φ = 82638144.

The previous prime is 87229157. The next prime is 87229183. The reversal of 87229171 is 17192278.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 87229171 - 2⁵ = 87229139 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87229171.

It is not an unprimeable number, because it can be changed into a prime (87229151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2295486 + ... + 2295523.

It is an arithmetic number, because the mean of its divisors is an integer number (22955050).

Almost surely, 2^87229171 is an apocalyptic number.

87229171 is a deficient number, since it is larger than the sum of its proper divisors (4591029).

87229171 is a wasteful number, since it uses less digits than its factorization.

87229171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4591028.

The product of its digits is 14112, while the sum is 37.

The square root of 87229171 is about 9339.6558287766. The cubic root of 87229171 is about 443.4934890988.

The spelling of 87229171 in words is "eighty-seven million, two hundred twenty-nine thousand, one hundred seventy-one".