684371 has 4 divisors (see below), whose sum is σ = 708000. Its totient is φ = 660744.

The previous prime is 684349. The next prime is 684373. The reversal of 684371 is 173486.

684371 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 173486 = 2 ⋅86743.

It is a cyclic number.

It is not a de Polignac number, because 684371 - 2¹⁴ = 667987 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 23599 = 684371 / (6 + 8 + 4 + 3 + 7 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684373) 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, 11771 + ... + 11828.

It is an arithmetic number, because the mean of its divisors is an integer number (177000).

2⁶⁸⁴³⁷¹ is an apocalyptic number.

684371 is a deficient number, since it is larger than the sum of its proper divisors (23629).

684371 is a wasteful number, since it uses less digits than its factorization.

684371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23628.

The product of its digits is 4032, while the sum is 29.

The square root of 684371 is about 827.2671877936. The cubic root of 684371 is about 88.1246082507.

The spelling of 684371 in words is "six hundred eighty-four thousand, three hundred seventy-one".