83207609 has 2 divisors, whose sum is σ = 83207610. Its totient is φ = 83207608.

The previous prime is 83207603. The next prime is 83207617. The reversal of 83207609 is 90670238.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55875625 + 27331984 = 7475^2 + 5228^2 .

It is a cyclic number.

It is not a de Polignac number, because 83207609 - 2²⁴ = 66430393 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (83207603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41603804 + 41603805.

It is an arithmetic number, because the mean of its divisors is an integer number (41603805).

Almost surely, 2^83207609 is an apocalyptic number.

It is an amenable number.

83207609 is a deficient number, since it is larger than the sum of its proper divisors (1).

83207609 is an equidigital number, since it uses as much as digits as its factorization.

83207609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 83207609 is about 9121.8204871615. The cubic root of 83207609 is about 436.5704611656.

The spelling of 83207609 in words is "eighty-three million, two hundred seven thousand, six hundred nine".