80784281 has 2 divisors, whose sum is σ = 80784282. Its totient is φ = 80784280.

The previous prime is 80784271. The next prime is 80784317. The reversal of 80784281 is 18248708.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80281600 + 502681 = 8960^2 + 709^2 .

It is a cyclic number.

It is not a de Polignac number, because 80784281 - 2⁶ = 80784217 is a prime.

It is a super-2 number, since 2×80784281² = 13052200113373922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80784241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40392140 + 40392141.

It is an arithmetic number, because the mean of its divisors is an integer number (40392141).

Almost surely, 2^80784281 is an apocalyptic number.

It is an amenable number.

80784281 is a deficient number, since it is larger than the sum of its proper divisors (1).

80784281 is an equidigital number, since it uses as much as digits as its factorization.

80784281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28672, while the sum is 38.

The square root of 80784281 is about 8988.0076212696. The cubic root of 80784281 is about 432.2904300597.

The spelling of 80784281 in words is "eighty million, seven hundred eighty-four thousand, two hundred eighty-one".