8199859 has 4 divisors (see below), whose sum is σ = 8214840. Its totient is φ = 8184880.

The previous prime is 8199857. The next prime is 8199869. The reversal of 8199859 is 9589918.

It is a happy number.

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 8199859 - 2¹ = 8199857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8199853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6637 + ... + 7774.

It is an arithmetic number, because the mean of its divisors is an integer number (2053710).

Almost surely, 2^8199859 is an apocalyptic number.

8199859 is a deficient number, since it is larger than the sum of its proper divisors (14981).

8199859 is a wasteful number, since it uses less digits than its factorization.

8199859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14980.

The product of its digits is 233280, while the sum is 49.

The square root of 8199859 is about 2863.5395928815. The cubic root of 8199859 is about 201.6518116994.

The spelling of 8199859 in words is "eight million, one hundred ninety-nine thousand, eight hundred fifty-nine".