80805089 has 2 divisors, whose sum is σ = 80805090. Its totient is φ = 80805088.

The previous prime is 80805073. The next prime is 80805103. The reversal of 80805089 is 98050808.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45900625 + 34904464 = 6775^2 + 5908^2 .

It is a cyclic number.

It is not a de Polignac number, because 80805089 - 2⁴ = 80805073 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 (80805059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40402544 + 40402545.

It is an arithmetic number, because the mean of its divisors is an integer number (40402545).

Almost surely, 2^80805089 is an apocalyptic number.

It is an amenable number.

80805089 is a deficient number, since it is larger than the sum of its proper divisors (1).

80805089 is an equidigital number, since it uses as much as digits as its factorization.

80805089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 38.

The square root of 80805089 is about 8989.1650891504. The cubic root of 80805089 is about 432.3275425894.

The spelling of 80805089 in words is "eighty million, eight hundred five thousand, eighty-nine".