80378281 has 2 divisors, whose sum is σ = 80378282. Its totient is φ = 80378280.

The previous prime is 80378267. The next prime is 80378321. The reversal of 80378281 is 18287308.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80371225 + 7056 = 8965^2 + 84^2 .

It is a cyclic number.

It is not a de Polignac number, because 80378281 - 2⁷ = 80378153 is a prime.

It is a super-2 number, since 2×80378281² = 12921336113029922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 80378281.

It is not a weakly prime, because it can be changed into another prime (80378231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40189140 + 40189141.

It is an arithmetic number, because the mean of its divisors is an integer number (40189141).

Almost surely, 2^80378281 is an apocalyptic number.

It is an amenable number.

80378281 is a deficient number, since it is larger than the sum of its proper divisors (1).

80378281 is an equidigital number, since it uses as much as digits as its factorization.

80378281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 80378281 is about 8965.3935217591. The cubic root of 80378281 is about 431.5650217751.

The spelling of 80378281 in words is "eighty million, three hundred seventy-eight thousand, two hundred eighty-one".