86817817 has 4 divisors (see below), whose sum is σ = 88836880. Its totient is φ = 84798756.

The previous prime is 86817791. The next prime is 86817839. The reversal of 86817817 is 71871868.

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 86817817 - 2²³ = 78429209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86814817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1009467 + ... + 1009552.

It is an arithmetic number, because the mean of its divisors is an integer number (22209220).

Almost surely, 2^86817817 is an apocalyptic number.

It is an amenable number.

86817817 is a deficient number, since it is larger than the sum of its proper divisors (2019063).

86817817 is a wasteful number, since it uses less digits than its factorization.

86817817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2019062.

The product of its digits is 150528, while the sum is 46.

The square root of 86817817 is about 9317.6079011729. The cubic root of 86817817 is about 442.7952504110.

The spelling of 86817817 in words is "eighty-six million, eight hundred seventeen thousand, eight hundred seventeen".