684213 has 8 divisors (see below), whose sum is σ = 919776. Its totient is φ = 452400.

The previous prime is 684191. The next prime is 684217. The reversal of 684213 is 312486.

It is a happy number.

684213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 684213 - 2⁸ = 683957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 478 + ... + 1263.

It is an arithmetic number, because the mean of its divisors is an integer number (114972).

2⁶⁸⁴²¹³ is an apocalyptic number.

It is an amenable number.

684213 is a deficient number, since it is larger than the sum of its proper divisors (235563).

684213 is a wasteful number, since it uses less digits than its factorization.

684213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1875.

The product of its digits is 1152, while the sum is 24.

The square root of 684213 is about 827.1716871364. The cubic root of 684213 is about 88.1178259841.

Adding to 684213 its reverse (312486), we get a palindrome (996699).

The spelling of 684213 in words is "six hundred eighty-four thousand, two hundred thirteen".