663249 has 4 divisors (see below), whose sum is σ = 884336. Its totient is φ = 442164.

The previous prime is 663241. The next prime is 663263. The reversal of 663249 is 942366.

663249 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 not a de Polignac number, because 663249 - 2³ = 663241 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

663249 is a lucky number.

It is a plaindrome in base 14.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 663249.

It is not an unprimeable number, because it can be changed into a prime (663241) 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, 110539 + ... + 110544.

It is an arithmetic number, because the mean of its divisors is an integer number (221084).

2⁶⁶³²⁴⁹ is an apocalyptic number.

It is an amenable number.

663249 is a deficient number, since it is larger than the sum of its proper divisors (221087).

663249 is a wasteful number, since it uses less digits than its factorization.

663249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221086.

The product of its digits is 7776, while the sum is 30.

The square root of 663249 is about 814.4010068756. The cubic root of 663249 is about 87.2085103076.

The spelling of 663249 in words is "six hundred sixty-three thousand, two hundred forty-nine".