80489209 has 2 divisors, whose sum is σ = 80489210. Its totient is φ = 80489208.

The previous prime is 80489183. The next prime is 80489231. The reversal of 80489209 is 90298408.

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., 73874025 + 6615184 = 8595^2 + 2572^2 .

It is a cyclic number.

It is not a de Polignac number, because 80489209 - 2⁷ = 80489081 is a prime.

It is not a weakly prime, because it can be changed into another prime (80480209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40244604 + 40244605.

It is an arithmetic number, because the mean of its divisors is an integer number (40244605).

Almost surely, 2^80489209 is an apocalyptic number.

It is an amenable number.

80489209 is a deficient number, since it is larger than the sum of its proper divisors (1).

80489209 is an equidigital number, since it uses as much as digits as its factorization.

80489209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 80489209 is about 8971.5778433896. The cubic root of 80489209 is about 431.7634611147.

The spelling of 80489209 in words is "eighty million, four hundred eighty-nine thousand, two hundred nine".