678213 has 12 divisors (see below), whose sum is σ = 1016288. Its totient is φ = 451980.

The previous prime is 678211. The next prime is 678217. The reversal of 678213 is 312876.

It is not a de Polignac number, because 678213 - 2¹ = 678211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678211) 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, 1153 + ... + 1638.

2⁶⁷⁸²¹³ is an apocalyptic number.

It is an amenable number.

678213 is a deficient number, since it is larger than the sum of its proper divisors (338075).

678213 is an equidigital number, since it uses as much as digits as its factorization.

678213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2806 (or 2794 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 678213 is about 823.5368844199. The cubic root of 678213 is about 87.8594951355.

The spelling of 678213 in words is "six hundred seventy-eight thousand, two hundred thirteen".