86718809 has 8 divisors (see below), whose sum is σ = 90953280. Its totient is φ = 82523056.

The previous prime is 86718803. The next prime is 86718829. The reversal of 86718809 is 90881768.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 86718809 - 2⁸ = 86718553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86718803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5039 + ... + 14100.

It is an arithmetic number, because the mean of its divisors is an integer number (11369160).

Almost surely, 2^86718809 is an apocalyptic number.

It is an amenable number.

86718809 is a deficient number, since it is larger than the sum of its proper divisors (4234471).

86718809 is a wasteful number, since it uses less digits than its factorization.

86718809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19359.

The product of its (nonzero) digits is 193536, while the sum is 47.

The square root of 86718809 is about 9312.2934339506. The cubic root of 86718809 is about 442.6268635155.

The spelling of 86718809 in words is "eighty-six million, seven hundred eighteen thousand, eight hundred nine".