86712173 has 4 divisors (see below), whose sum is σ = 86732160. Its totient is φ = 86692188.

The previous prime is 86712163. The next prime is 86712179. The reversal of 86712173 is 37121768.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86712173 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 (86712179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 443 + ... + 13176.

It is an arithmetic number, because the mean of its divisors is an integer number (21683040).

Almost surely, 2^86712173 is an apocalyptic number.

It is an amenable number.

86712173 is a deficient number, since it is larger than the sum of its proper divisors (19987).

86712173 is a wasteful number, since it uses less digits than its factorization.

86712173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19986.

The product of its digits is 14112, while the sum is 35.

The square root of 86712173 is about 9311.9371239286. The cubic root of 86712173 is about 442.6155728208.

The spelling of 86712173 in words is "eighty-six million, seven hundred twelve thousand, one hundred seventy-three".