678586481 has 2 divisors, whose sum is σ = 678586482. Its totient is φ = 678586480.

The previous prime is 678586477. The next prime is 678586487. The reversal of 678586481 is 184685876.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 451180081 + 227406400 = 21241^2 + 15080^2 .

It is a cyclic number.

It is not a de Polignac number, because 678586481 - 2² = 678586477 is a prime.

It is a super-2 number, since 2×678586481² = 920959224391926722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (678586487) 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, 339293240 + 339293241.

It is an arithmetic number, because the mean of its divisors is an integer number (339293241).

Almost surely, 2^678586481 is an apocalyptic number.

It is an amenable number.

678586481 is a deficient number, since it is larger than the sum of its proper divisors (1).

678586481 is an equidigital number, since it uses as much as digits as its factorization.

678586481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2580480, while the sum is 53.

The square root of 678586481 is about 26049.6925317747. The cubic root of 678586481 is about 878.7561977997.

The spelling of 678586481 in words is "six hundred seventy-eight million, five hundred eighty-six thousand, four hundred eighty-one".