678603213 has 12 divisors (see below), whose sum is σ = 980465148. Its totient is φ = 452281920.

The previous prime is 678603203. The next prime is 678603217. The reversal of 678603213 is 312306876.

It is a happy number.

678603213 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 442765764 + 235837449 = 21042^2 + 15357^2 .

It is not a de Polignac number, because 678603213 - 2⁴ = 678603197 is a prime.

It is a super-3 number, since 3×678603213³ (a number of 27 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678603217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37681 + ... + 52697.

It is an arithmetic number, because the mean of its divisors is an integer number (81705429).

Almost surely, 2^678603213 is an apocalyptic number.

It is an amenable number.

678603213 is a deficient number, since it is larger than the sum of its proper divisors (301861935).

678603213 is a wasteful number, since it uses less digits than its factorization.

678603213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20044 (or 20041 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 678603213 is about 26050.0136852171. The cubic root of 678603213 is about 878.7634202777.

The spelling of 678603213 in words is "six hundred seventy-eight million, six hundred three thousand, two hundred thirteen".