683387 has 4 divisors (see below), whose sum is σ = 688896. Its totient is φ = 677880.

The previous prime is 683381. The next prime is 683401. The reversal of 683387 is 783386.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 783386 = 2 ⋅391693.

It is a cyclic number.

It is not a de Polignac number, because 683387 - 2⁶ = 683323 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 683387.

It is not an unprimeable number, because it can be changed into a prime (683381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2564 + ... + 2817.

It is an arithmetic number, because the mean of its divisors is an integer number (172224).

2⁶⁸³³⁸⁷ is an apocalyptic number.

683387 is a deficient number, since it is larger than the sum of its proper divisors (5509).

683387 is a wasteful number, since it uses less digits than its factorization.

683387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5508.

The product of its digits is 24192, while the sum is 35.

The square root of 683387 is about 826.6722446048. The cubic root of 683387 is about 88.0823523166.

Subtracting 683387 from its reverse (783386), we obtain a palindrome (99999).

The spelling of 683387 in words is "six hundred eighty-three thousand, three hundred eighty-seven".