8189999 has 2 divisors, whose sum is σ = 8190000. Its totient is φ = 8189998.

The previous prime is 8189981. The next prime is 8190011. The reversal of 8189999 is 9999818.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8189999 - 2⁸ = 8189743 is a prime.

It is a Sophie Germain prime.

8189999 is a modest number, since divided by 9999 gives 818 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 8189999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8189939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4094999 + 4095000.

It is an arithmetic number, because the mean of its divisors is an integer number (4095000).

Almost surely, 2^8189999 is an apocalyptic number.

8189999 is a deficient number, since it is larger than the sum of its proper divisors (1).

8189999 is an equidigital number, since it uses as much as digits as its factorization.

8189999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 53.

The square root of 8189999 is about 2861.8174295367. The cubic root of 8189999 is about 201.5709532220.

The spelling of 8189999 in words is "eight million, one hundred eighty-nine thousand, nine hundred ninety-nine".