8158109 has 2 divisors, whose sum is σ = 8158110. Its totient is φ = 8158108.

The previous prime is 8158103. The next prime is 8158127. The reversal of 8158109 is 9018518.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6996025 + 1162084 = 2645^2 + 1078^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8158109 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 (8158103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4079054 + 4079055.

It is an arithmetic number, because the mean of its divisors is an integer number (4079055).

Almost surely, 2^8158109 is an apocalyptic number.

It is an amenable number.

8158109 is a deficient number, since it is larger than the sum of its proper divisors (1).

8158109 is an equidigital number, since it uses as much as digits as its factorization.

8158109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 32.

The square root of 8158109 is about 2856.2403610341. The cubic root of 8158109 is about 201.3089890476.

The spelling of 8158109 in words is "eight million, one hundred fifty-eight thousand, one hundred nine".