678033689 has 2 divisors, whose sum is σ = 678033690. Its totient is φ = 678033688.

The previous prime is 678033683. The next prime is 678033701. The reversal of 678033689 is 986330876.

678033689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 527161600 + 150872089 = 22960^2 + 12283^2 .

It is a cyclic number.

It is not a de Polignac number, because 678033689 - 2²⁴ = 661256473 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (678033683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339016844 + 339016845.

It is an arithmetic number, because the mean of its divisors is an integer number (339016845).

Almost surely, 2^678033689 is an apocalyptic number.

It is an amenable number.

678033689 is a deficient number, since it is larger than the sum of its proper divisors (1).

678033689 is an equidigital number, since it uses as much as digits as its factorization.

678033689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1306368, while the sum is 50.

The square root of 678033689 is about 26039.0800336725. The cubic root of 678033689 is about 878.5175147059.

The spelling of 678033689 in words is "six hundred seventy-eight million, thirty-three thousand, six hundred eighty-nine".