8159209 has 2 divisors, whose sum is σ = 8159210. Its totient is φ = 8159208.

The previous prime is 8159197. The next prime is 8159213. The reversal of 8159209 is 9029518.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8139609 + 19600 = 2853^2 + 140^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8159209 is a prime.

It is a plaindrome in base 14.

It is not a weakly prime, because it can be changed into another prime (8159219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4079604 + 4079605.

It is an arithmetic number, because the mean of its divisors is an integer number (4079605).

Almost surely, 2^8159209 is an apocalyptic number.

It is an amenable number.

8159209 is a deficient number, since it is larger than the sum of its proper divisors (1).

8159209 is an equidigital number, since it uses as much as digits as its factorization.

8159209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 8159209 is about 2856.4329153684. The cubic root of 8159209 is about 201.3180364848.

The spelling of 8159209 in words is "eight million, one hundred fifty-nine thousand, two hundred nine".