681303 has 8 divisors (see below), whose sum is σ = 1038208. Its totient is φ = 389304.

The previous prime is 681293. The next prime is 681311. The reversal of 681303 is 303186.

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

It is not a de Polignac number, because 681303 - 2⁵ = 681271 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 32443 = 681303 / (6 + 8 + 1 + 3 + 0 + 3).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 681303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16201 + ... + 16242.

It is an arithmetic number, because the mean of its divisors is an integer number (129776).

2⁶⁸¹³⁰³ is an apocalyptic number.

681303 is a deficient number, since it is larger than the sum of its proper divisors (356905).

681303 is a wasteful number, since it uses less digits than its factorization.

681303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32453.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 681303 is about 825.4108068108. The cubic root of 681303 is about 87.9927249495.

Adding to 681303 its reverse (303186), we get a palindrome (984489).

The spelling of 681303 in words is "six hundred eighty-one thousand, three hundred three".