78080281 has 2 divisors, whose sum is σ = 78080282. Its totient is φ = 78080280.

The previous prime is 78080279. The next prime is 78080287. The reversal of 78080281 is 18208087.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68624656 + 9455625 = 8284^2 + 3075^2 .

It is a cyclic number.

It is not a de Polignac number, because 78080281 - 2¹ = 78080279 is a prime.

It is a super-2 number, since 2×78080281² = 12193060562077922, which contains 22 as substring.

Together with 78080279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (78080287) 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, 39040140 + 39040141.

It is an arithmetic number, because the mean of its divisors is an integer number (39040141).

Almost surely, 2^78080281 is an apocalyptic number.

It is an amenable number.

78080281 is a deficient number, since it is larger than the sum of its proper divisors (1).

78080281 is an equidigital number, since it uses as much as digits as its factorization.

78080281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7168, while the sum is 34.

The square root of 78080281 is about 8836.3047140759. The cubic root of 78080281 is about 427.4124047926.

The spelling of 78080281 in words is "seventy-eight million, eighty thousand, two hundred eighty-one".