678698 has 8 divisors (see below), whose sum is σ = 1025892. Its totient is φ = 336736.

The previous prime is 678659. The next prime is 678719. The reversal of 678698 is 896876.

678698 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 677329 + 1369 = 823^2 + 37^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 678698.

It is an unprimeable number.

678698 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 965 + ... + 1512.

2⁶⁷⁸⁶⁹⁸ is an apocalyptic number.

678698 is a deficient number, since it is larger than the sum of its proper divisors (347194).

678698 is a wasteful number, since it uses less digits than its factorization.

678698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2616.

The product of its digits is 145152, while the sum is 44.

The square root of 678698 is about 823.8312934090. The cubic root of 678698 is about 87.8804333470.

The spelling of 678698 in words is "six hundred seventy-eight thousand, six hundred ninety-eight".