87982171 has 8 divisors (see below), whose sum is σ = 90742784. Its totient is φ = 85254120.

The previous prime is 87982159. The next prime is 87982229. The reversal of 87982171 is 17128978.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87982171 - 2⁷ = 87982043 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87982571) 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 7 ways as a sum of consecutive naturals, for example, 2595 + ... + 13516.

It is an arithmetic number, because the mean of its divisors is an integer number (11342848).

Almost surely, 2^87982171 is an apocalyptic number.

87982171 is a deficient number, since it is larger than the sum of its proper divisors (2760613).

87982171 is a wasteful number, since it uses less digits than its factorization.

87982171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16281.

The product of its digits is 56448, while the sum is 43.

The square root of 87982171 is about 9379.8811826163. The cubic root of 87982171 is about 444.7659771903.

The spelling of 87982171 in words is "eighty-seven million, nine hundred eighty-two thousand, one hundred seventy-one".