83489309 has 2 divisors, whose sum is σ = 83489310. Its totient is φ = 83489308.

The previous prime is 83489299. The next prime is 83489317. The reversal of 83489309 is 90398438.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60497284 + 22992025 = 7778^2 + 4795^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83489309 is a prime.

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 83489309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83489339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41744654 + 41744655.

It is an arithmetic number, because the mean of its divisors is an integer number (41744655).

Almost surely, 2^83489309 is an apocalyptic number.

It is an amenable number.

83489309 is a deficient number, since it is larger than the sum of its proper divisors (1).

83489309 is an equidigital number, since it uses as much as digits as its factorization.

83489309 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 44.

The square root of 83489309 is about 9137.2484370296. The cubic root of 83489309 is about 437.0625771129.

The spelling of 83489309 in words is "eighty-three million, four hundred eighty-nine thousand, three hundred nine".