678819683 has 2 divisors, whose sum is σ = 678819684. Its totient is φ = 678819682.

The previous prime is 678819667. The next prime is 678819697. The reversal of 678819683 is 386918876.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 678819683 - 2⁴ = 678819667 is a prime.

It is not a weakly prime, because it can be changed into another prime (678819613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339409841 + 339409842.

It is an arithmetic number, because the mean of its divisors is an integer number (339409842).

Almost surely, 2^678819683 is an apocalyptic number.

678819683 is a deficient number, since it is larger than the sum of its proper divisors (1).

678819683 is an equidigital number, since it uses as much as digits as its factorization.

678819683 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3483648, while the sum is 56.

The square root of 678819683 is about 26054.1682461751. The cubic root of 678819683 is about 878.8568502776.

The spelling of 678819683 in words is "six hundred seventy-eight million, eight hundred nineteen thousand, six hundred eighty-three".