8147999 has 2 divisors, whose sum is σ = 8148000. Its totient is φ = 8147998.

The previous prime is 8147987. The next prime is 8148013. The reversal of 8147999 is 9997418.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8147999 - 2⁴ = 8147983 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8147299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4073999 + 4074000.

It is an arithmetic number, because the mean of its divisors is an integer number (4074000).

Almost surely, 2^8147999 is an apocalyptic number.

8147999 is a deficient number, since it is larger than the sum of its proper divisors (1).

8147999 is an equidigital number, since it uses as much as digits as its factorization.

8147999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 47.

The square root of 8147999 is about 2854.4700033456. The cubic root of 8147999 is about 201.2257967627.

The spelling of 8147999 in words is "eight million, one hundred forty-seven thousand, nine hundred ninety-nine".