86694809 has 4 divisors (see below), whose sum is σ = 86745216. Its totient is φ = 86644404.

The previous prime is 86694799. The next prime is 86694857. The reversal of 86694809 is 90849668.

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 not a de Polignac number, because 86694809 - 2⁴ = 86694793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86694859) 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, 22529 + ... + 26094.

It is an arithmetic number, because the mean of its divisors is an integer number (21686304).

Almost surely, 2^86694809 is an apocalyptic number.

It is an amenable number.

86694809 is a deficient number, since it is larger than the sum of its proper divisors (50407).

86694809 is a wasteful number, since it uses less digits than its factorization.

86694809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50406.

The product of its (nonzero) digits is 746496, while the sum is 50.

The square root of 86694809 is about 9311.0047255922. The cubic root of 86694809 is about 442.5860264507.

The spelling of 86694809 in words is "eighty-six million, six hundred ninety-four thousand, eight hundred nine".