86917971 has 8 divisors (see below), whose sum is σ = 132446464. Its totient is φ = 49667400.

The previous prime is 86917949. The next prime is 86917979. The reversal of 86917971 is 17971968.

It is a happy number.

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

It is not a de Polignac number, because 86917971 - 2⁶ = 86917907 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 86917971.

It is not an unprimeable number, because it can be changed into a prime (86917979) 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, 2069455 + ... + 2069496.

It is an arithmetic number, because the mean of its divisors is an integer number (16555808).

Almost surely, 2^86917971 is an apocalyptic number.

86917971 is a deficient number, since it is larger than the sum of its proper divisors (45528493).

86917971 is a wasteful number, since it uses less digits than its factorization.

86917971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4138961.

The product of its digits is 190512, while the sum is 48.

The square root of 86917971 is about 9322.9808001518. The cubic root of 86917971 is about 442.9654561538.

The spelling of 86917971 in words is "eighty-six million, nine hundred seventeen thousand, nine hundred seventy-one".