8199689 has 2 divisors, whose sum is σ = 8199690. Its totient is φ = 8199688.

The previous prime is 8199679. The next prime is 8199703. The reversal of 8199689 is 9869918.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6553600 + 1646089 = 2560^2 + 1283^2 .

It is a cyclic number.

It is not a de Polignac number, because 8199689 - 2⁴ = 8199673 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8199629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4099844 + 4099845.

It is an arithmetic number, because the mean of its divisors is an integer number (4099845).

Almost surely, 2^8199689 is an apocalyptic number.

It is an amenable number.

8199689 is a deficient number, since it is larger than the sum of its proper divisors (1).

8199689 is an equidigital number, since it uses as much as digits as its factorization.

8199689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 50.

The square root of 8199689 is about 2863.5099091849. The cubic root of 8199689 is about 201.6504181370.

It can be divided in two parts, 8199 and 689, that added together give a palindrome (8888).

The spelling of 8199689 in words is "eight million, one hundred ninety-nine thousand, six hundred eighty-nine".