83309209 has 2 divisors, whose sum is σ = 83309210. Its totient is φ = 83309208.

The previous prime is 83309203. The next prime is 83309249. The reversal of 83309209 is 90290338.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74736025 + 8573184 = 8645^2 + 2928^2 .

It is a cyclic number.

It is not a de Polignac number, because 83309209 - 2³ = 83309201 is a prime.

It is not a weakly prime, because it can be changed into another prime (83309201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41654604 + 41654605.

It is an arithmetic number, because the mean of its divisors is an integer number (41654605).

Almost surely, 2^83309209 is an apocalyptic number.

It is an amenable number.

83309209 is a deficient number, since it is larger than the sum of its proper divisors (1).

83309209 is an equidigital number, since it uses as much as digits as its factorization.

83309209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 83309209 is about 9127.3878519541. The cubic root of 83309209 is about 436.7480792076.

The spelling of 83309209 in words is "eighty-three million, three hundred nine thousand, two hundred nine".