86818919 has 8 divisors (see below), whose sum is σ = 94899600. Its totient is φ = 78769600.

The previous prime is 86818903. The next prime is 86818931. The reversal of 86818919 is 91981868.

It is a happy number.

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 86818919 - 2⁴ = 86818903 is a prime.

It is a super-2 number, since 2×86818919² = 15075049392657122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86818939) 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, 1844 + ... + 13305.

It is an arithmetic number, because the mean of its divisors is an integer number (11862450).

Almost surely, 2^86818919 is an apocalyptic number.

86818919 is a deficient number, since it is larger than the sum of its proper divisors (8080681).

86818919 is a wasteful number, since it uses less digits than its factorization.

86818919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15681.

The product of its digits is 248832, while the sum is 50.

The square root of 86818919 is about 9317.6670363348. The cubic root of 86818919 is about 442.7971239062.

The spelling of 86818919 in words is "eighty-six million, eight hundred eighteen thousand, nine hundred nineteen".