678390851 has 2 divisors, whose sum is σ = 678390852. Its totient is φ = 678390850.

The previous prime is 678390829. The next prime is 678390859. The reversal of 678390851 is 158093876.

It is a happy number.

678390851 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 678390851 - 2²⁶ = 611281987 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 678390796 and 678390805.

It is not a weakly prime, because it can be changed into another prime (678390859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339195425 + 339195426.

It is an arithmetic number, because the mean of its divisors is an integer number (339195426).

Almost surely, 2^678390851 is an apocalyptic number.

678390851 is a deficient number, since it is larger than the sum of its proper divisors (1).

678390851 is an equidigital number, since it uses as much as digits as its factorization.

678390851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 678390851 is about 26045.9373223541. The cubic root of 678390851 is about 878.6717440111.

The spelling of 678390851 in words is "six hundred seventy-eight million, three hundred ninety thousand, eight hundred fifty-one".