86117819 has 4 divisors (see below), whose sum is σ = 89862096. Its totient is φ = 82373544.

The previous prime is 86117807. The next prime is 86117839. The reversal of 86117819 is 91871168.

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 86117819 - 2⁴ = 86117803 is a prime.

It is a super-2 number, since 2×86117819² = 14832557498633522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86117839) 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, 1872104 + ... + 1872149.

It is an arithmetic number, because the mean of its divisors is an integer number (22465524).

Almost surely, 2^86117819 is an apocalyptic number.

86117819 is a deficient number, since it is larger than the sum of its proper divisors (3744277).

86117819 is a wasteful number, since it uses less digits than its factorization.

86117819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3744276.

The product of its digits is 24192, while the sum is 41.

The square root of 86117819 is about 9279.9686960679. The cubic root of 86117819 is about 441.6019754466.

The spelling of 86117819 in words is "eighty-six million, one hundred seventeen thousand, eight hundred nineteen".