86855999 has 8 divisors (see below), whose sum is σ = 89108208. Its totient is φ = 84610240.

The previous prime is 86855987. The next prime is 86856023. The reversal of 86855999 is 99955868.

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 86855999 - 2¹² = 86851903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86855959) 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, 37709 + ... + 39945.

It is an arithmetic number, because the mean of its divisors is an integer number (11138526).

Almost surely, 2^86855999 is an apocalyptic number.

86855999 is a deficient number, since it is larger than the sum of its proper divisors (2252209).

86855999 is a wasteful number, since it uses less digits than its factorization.

86855999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3225.

The product of its digits is 6998400, while the sum is 59.

The square root of 86855999 is about 9319.6565923858. The cubic root of 86855999 is about 442.8601538718.

The spelling of 86855999 in words is "eighty-six million, eight hundred fifty-five thousand, nine hundred ninety-nine".