86710809 has 16 divisors (see below), whose sum is σ = 119470464. Its totient is φ = 55910400.

The previous prime is 86710807. The next prime is 86710849. The reversal of 86710809 is 90801768.

It is not a de Polignac number, because 86710809 - 2¹ = 86710807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86710801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7449 + ... + 15129.

It is an arithmetic number, because the mean of its divisors is an integer number (7466904).

Almost surely, 2^86710809 is an apocalyptic number.

It is an amenable number.

86710809 is a deficient number, since it is larger than the sum of its proper divisors (32759655).

86710809 is a wasteful number, since it uses less digits than its factorization.

86710809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7808.

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 86710809 is about 9311.8638843145. The cubic root of 86710809 is about 442.6132519979.

The spelling of 86710809 in words is "eighty-six million, seven hundred ten thousand, eight hundred nine".