80805289 has 2 divisors, whose sum is σ = 80805290. Its totient is φ = 80805288.

The previous prime is 80805259. The next prime is 80805293. The reversal of 80805289 is 98250808.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63872064 + 16933225 = 7992^2 + 4115^2 .

It is a cyclic number.

It is not a de Polignac number, because 80805289 - 2¹⁵ = 80772521 is a prime.

It is not a weakly prime, because it can be changed into another prime (80805209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40402644 + 40402645.

It is an arithmetic number, because the mean of its divisors is an integer number (40402645).

Almost surely, 2^80805289 is an apocalyptic number.

It is an amenable number.

80805289 is a deficient number, since it is larger than the sum of its proper divisors (1).

80805289 is an equidigital number, since it uses as much as digits as its factorization.

80805289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 40.

The square root of 80805289 is about 8989.1762136472. The cubic root of 80805289 is about 432.3278992725.

The spelling of 80805289 in words is "eighty million, eight hundred five thousand, two hundred eighty-nine".