678673241 has 2 divisors, whose sum is σ = 678673242. Its totient is φ = 678673240.

The previous prime is 678673231. The next prime is 678673301. The reversal of 678673241 is 142376876.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 454542400 + 224130841 = 21320^2 + 14971^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-678673241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 678673192 and 678673201.

It is not a weakly prime, because it can be changed into another prime (678673231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339336620 + 339336621.

It is an arithmetic number, because the mean of its divisors is an integer number (339336621).

Almost surely, 2^678673241 is an apocalyptic number.

It is an amenable number.

678673241 is a deficient number, since it is larger than the sum of its proper divisors (1).

678673241 is an equidigital number, since it uses as much as digits as its factorization.

678673241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 44.

The square root of 678673241 is about 26051.3577573224. The cubic root of 678673241 is about 878.7936470371.

The spelling of 678673241 in words is "six hundred seventy-eight million, six hundred seventy-three thousand, two hundred forty-one".