86671693 has 6 divisors (see below), whose sum is σ = 87341294. Its totient is φ = 86003736.

The previous prime is 86671681. The next prime is 86671721. The reversal of 86671693 is 39617668.

It can be written as a sum of positive squares in only one way, i.e., 66797929 + 19873764 = 8173^2 + 4458^2 .

It is a de Polignac number, because none of the positive numbers 2^k-86671693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86671093) 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 5 ways as a sum of consecutive naturals, for example, 116280 + ... + 117022.

Almost surely, 2^86671693 is an apocalyptic number.

It is an amenable number.

86671693 is a deficient number, since it is larger than the sum of its proper divisors (669601).

86671693 is an frugal number, since it uses more digits than its factorization.

86671693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643 (or 900 counting only the distinct ones).

The product of its digits is 326592, while the sum is 46.

The square root of 86671693 is about 9309.7633160033. The cubic root of 86671693 is about 442.5466864251.

The spelling of 86671693 in words is "eighty-six million, six hundred seventy-one thousand, six hundred ninety-three".