678386341 has 2 divisors, whose sum is σ = 678386342. Its totient is φ = 678386340.

The previous prime is 678386339. The next prime is 678386363. The reversal of 678386341 is 143683876.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 406828900 + 271557441 = 20170^2 + 16479^2 .

It is a cyclic number.

It is not a de Polignac number, because 678386341 - 2¹ = 678386339 is a prime.

Together with 678386339, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 678386291 and 678386300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (676386341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339193170 + 339193171.

It is an arithmetic number, because the mean of its divisors is an integer number (339193171).

Almost surely, 2^678386341 is an apocalyptic number.

It is an amenable number.

678386341 is a deficient number, since it is larger than the sum of its proper divisors (1).

678386341 is an equidigital number, since it uses as much as digits as its factorization.

678386341 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 46.

The square root of 678386341 is about 26045.8507444084. The cubic root of 678386341 is about 878.6697968453.

The spelling of 678386341 in words is "six hundred seventy-eight million, three hundred eighty-six thousand, three hundred forty-one".