8134198309 has 2 divisors, whose sum is σ = 8134198310. Its totient is φ = 8134198308.

The previous prime is 8134198277. The next prime is 8134198339. The reversal of 8134198309 is 9038914318.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7106995809 + 1027202500 = 84303^2 + 32050^2 .

It is a cyclic number.

It is not a de Polignac number, because 8134198309 - 2⁵ = 8134198277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8134198339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4067099154 + 4067099155.

It is an arithmetic number, because the mean of its divisors is an integer number (4067099155).

Almost surely, 2^8134198309 is an apocalyptic number.

It is an amenable number.

8134198309 is a deficient number, since it is larger than the sum of its proper divisors (1).

8134198309 is an equidigital number, since it uses as much as digits as its factorization.

8134198309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 8134198309 is about 90189.7904920507. The cubic root of 8134198309 is about 2011.1212368376.

The spelling of 8134198309 in words is "eight billion, one hundred thirty-four million, one hundred ninety-eight thousand, three hundred nine".