86695391 has 4 divisors (see below), whose sum is σ = 86714784. Its totient is φ = 86676000.

The previous prime is 86695369. The next prime is 86695397. The reversal of 86695391 is 19359668.

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 86695391 - 2²⁶ = 19586527 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 (86695397) 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, 791 + ... + 13191.

It is an arithmetic number, because the mean of its divisors is an integer number (21678696).

Almost surely, 2^86695391 is an apocalyptic number.

86695391 is a deficient number, since it is larger than the sum of its proper divisors (19393).

86695391 is a wasteful number, since it uses less digits than its factorization.

86695391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19392.

The product of its digits is 349920, while the sum is 47.

The square root of 86695391 is about 9311.0359788801. The cubic root of 86695391 is about 442.5870168387.

The spelling of 86695391 in words is "eighty-six million, six hundred ninety-five thousand, three hundred ninety-one".