83199509 has 2 divisors, whose sum is σ = 83199510. Its totient is φ = 83199508.

The previous prime is 83199497. The next prime is 83199511. The reversal of 83199509 is 90599138.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66471409 + 16728100 = 8153^2 + 4090^2 .

It is a cyclic number.

It is not a de Polignac number, because 83199509 - 2⁸ = 83199253 is a prime.

Together with 83199511, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 83199509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83799509) 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, 41599754 + 41599755.

It is an arithmetic number, because the mean of its divisors is an integer number (41599755).

Almost surely, 2^83199509 is an apocalyptic number.

It is an amenable number.

83199509 is a deficient number, since it is larger than the sum of its proper divisors (1).

83199509 is an equidigital number, since it uses as much as digits as its factorization.

83199509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 83199509 is about 9121.3764860354. The cubic root of 83199509 is about 436.5562944505.

The spelling of 83199509 in words is "eighty-three million, one hundred ninety-nine thousand, five hundred nine".