646303 has 8 divisors (see below), whose sum is σ = 745472. Its totient is φ = 548856.

The previous prime is 646301. The next prime is 646307. The reversal of 646303 is 303646.

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

It is not a de Polignac number, because 646303 - 2¹ = 646301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646301) 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 7 ways as a sum of consecutive naturals, for example, 526 + ... + 1252.

It is an arithmetic number, because the mean of its divisors is an integer number (93184).

2⁶⁴⁶³⁰³ is an apocalyptic number.

646303 is a deficient number, since it is larger than the sum of its proper divisors (99169).

646303 is a wasteful number, since it uses less digits than its factorization.

646303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861.

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 646303 is about 803.9297232968. The cubic root of 646303 is about 86.4593681333.

Adding to 646303 its reverse (303646), we get a palindrome (949949).

It can be divided in two parts, 646 and 303, that added together give a palindrome (949).

The spelling of 646303 in words is "six hundred forty-six thousand, three hundred three".