684133 has 4 divisors (see below), whose sum is σ = 720160. Its totient is φ = 648108.

The previous prime is 684127. The next prime is 684157. The reversal of 684133 is 331486.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-684133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 684098 and 684107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17985 + ... + 18022.

It is an arithmetic number, because the mean of its divisors is an integer number (180040).

2⁶⁸⁴¹³³ is an apocalyptic number.

It is an amenable number.

684133 is a deficient number, since it is larger than the sum of its proper divisors (36027).

684133 is a wasteful number, since it uses less digits than its factorization.

684133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36026.

The product of its digits is 1728, while the sum is 25.

The square root of 684133 is about 827.1233281682. The cubic root of 684133 is about 88.1143915269.

The spelling of 684133 in words is "six hundred eighty-four thousand, one hundred thirty-three".