86642671 has 2 divisors, whose sum is σ = 86642672. Its totient is φ = 86642670.

The previous prime is 86642663. The next prime is 86642687. The reversal of 86642671 is 17624668.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86642671 - 2³ = 86642663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86642371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43321335 + 43321336.

It is an arithmetic number, because the mean of its divisors is an integer number (43321336).

Almost surely, 2^86642671 is an apocalyptic number.

86642671 is a deficient number, since it is larger than the sum of its proper divisors (1).

86642671 is an equidigital number, since it uses as much as digits as its factorization.

86642671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 40.

The square root of 86642671 is about 9308.2044992576. The cubic root of 86642671 is about 442.4972853526.

The spelling of 86642671 in words is "eighty-six million, six hundred forty-two thousand, six hundred seventy-one".