9198134809 has 2 divisors, whose sum is σ = 9198134810. Its totient is φ = 9198134808.

The previous prime is 9198134807. The next prime is 9198134819. The reversal of 9198134809 is 9084318919.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5044976784 + 4153158025 = 71028^2 + 64445^2 .

It is a cyclic number.

It is not a de Polignac number, because 9198134809 - 2¹ = 9198134807 is a prime.

Together with 9198134807, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (9198134807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4599067404 + 4599067405.

It is an arithmetic number, because the mean of its divisors is an integer number (4599067405).

Almost surely, 2^9198134809 is an apocalyptic number.

It is an amenable number.

9198134809 is a deficient number, since it is larger than the sum of its proper divisors (1).

9198134809 is an equidigital number, since it uses as much as digits as its factorization.

9198134809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 559872, while the sum is 52.

The square root of 9198134809 is about 95906.9069931879. The cubic root of 9198134809 is about 2095.2374923433.

The spelling of 9198134809 in words is "nine billion, one hundred ninety-eight million, one hundred thirty-four thousand, eight hundred nine".