83608889809 has 2 divisors, whose sum is σ = 83608889810. Its totient is φ = 83608889808.

The previous prime is 83608889801. The next prime is 83608889863. The reversal of 83608889809 is 90898880638.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65486345409 + 18122544400 = 255903^2 + 134620^2 .

It is a cyclic number.

It is not a de Polignac number, because 83608889809 - 2³ = 83608889801 is a prime.

It is not a weakly prime, because it can be changed into another prime (83608889801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41804444904 + 41804444905.

It is an arithmetic number, because the mean of its divisors is an integer number (41804444905).

Almost surely, 2^83608889809 is an apocalyptic number.

It is an amenable number.

83608889809 is a deficient number, since it is larger than the sum of its proper divisors (1).

83608889809 is an equidigital number, since it uses as much as digits as its factorization.

83608889809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47775744, while the sum is 67.

The spelling of 83608889809 in words is "eighty-three billion, six hundred eight million, eight hundred eighty-nine thousand, eight hundred nine".