684393 has 4 divisors (see below), whose sum is σ = 912528. Its totient is φ = 456260.

The previous prime is 684379. The next prime is 684407. The reversal of 684393 is 393486.

684393 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (684379) and next prime (684407).

It is a cyclic number.

It is not a de Polignac number, because 684393 - 2⁶ = 684329 is a prime.

It is a D-number.

684393 is a lucky 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, 114063 + ... + 114068.

It is an arithmetic number, because the mean of its divisors is an integer number (228132).

2⁶⁸⁴³⁹³ is an apocalyptic number.

It is an amenable number.

684393 is a deficient number, since it is larger than the sum of its proper divisors (228135).

684393 is a wasteful number, since it uses less digits than its factorization.

684393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228134.

The product of its digits is 15552, while the sum is 33.

The square root of 684393 is about 827.2804844791. The cubic root of 684393 is about 88.1255525341.

The spelling of 684393 in words is "six hundred eighty-four thousand, three hundred ninety-three".