663243 has 8 divisors (see below), whose sum is σ = 1010688. Its totient is φ = 378984.

The previous prime is 663241. The next prime is 663263. The reversal of 663243 is 342366.

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

It is not a de Polignac number, because 663243 - 2¹ = 663241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663241) 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, 15771 + ... + 15812.

It is an arithmetic number, because the mean of its divisors is an integer number (126336).

2⁶⁶³²⁴³ is an apocalyptic number.

663243 is a deficient number, since it is larger than the sum of its proper divisors (347445).

663243 is a wasteful number, since it uses less digits than its factorization.

663243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31593.

The product of its digits is 2592, while the sum is 24.

The square root of 663243 is about 814.3973231783. The cubic root of 663243 is about 87.2082473332.

The spelling of 663243 in words is "six hundred sixty-three thousand, two hundred forty-three".