86971 has 4 divisors (see below), whose sum is σ = 90000. Its totient is φ = 83944.

The previous prime is 86969. The next prime is 86981. The reversal of 86971 is 17968.

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

It is a cyclic number.

It is not a de Polignac number, because 86971 - 2¹ = 86969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1471 + ... + 1528.

It is an arithmetic number, because the mean of its divisors is an integer number (22500).

2⁸⁶⁹⁷¹ is an apocalyptic number.

86971 is a deficient number, since it is larger than the sum of its proper divisors (3029).

86971 is a wasteful number, since it uses less digits than its factorization.

86971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3028.

The product of its digits is 3024, while the sum is 31.

The square root of 86971 is about 294.9084603737. The cubic root of 86971 is about 44.3055522835.

The spelling of 86971 in words is "eighty-six thousand, nine hundred seventy-one".