678197 has 6 divisors (see below), whose sum is σ = 734562. Its totient is φ = 625872.

The previous prime is 678191. The next prime is 678199. The reversal of 678197 is 791876.

It is a happy number.

678197 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 3 ways, for example, as 23716 + 654481 = 154^2 + 809^2 .

It is not a de Polignac number, because 678197 - 2⁶ = 678133 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 678197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678191) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1838 + ... + 2175.

It is an arithmetic number, because the mean of its divisors is an integer number (122427).

2⁶⁷⁸¹⁹⁷ is an apocalyptic number.

It is an amenable number.

678197 is a deficient number, since it is larger than the sum of its proper divisors (56365).

678197 is a wasteful number, since it uses less digits than its factorization.

678197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4039 (or 4026 counting only the distinct ones).

The product of its digits is 21168, while the sum is 38.

The square root of 678197 is about 823.5271701650. The cubic root of 678197 is about 87.8588042203.

The spelling of 678197 in words is "six hundred seventy-eight thousand, one hundred ninety-seven".