663343423 has 4 divisors (see below), whose sum is σ = 664998048. Its totient is φ = 661688800.

The previous prime is 663343411. The next prime is 663343441. The reversal of 663343423 is 324343366.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-663343423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663343403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 826711 + ... + 827512.

It is an arithmetic number, because the mean of its divisors is an integer number (166249512).

Almost surely, 2^663343423 is an apocalyptic number.

663343423 is a deficient number, since it is larger than the sum of its proper divisors (1654625).

663343423 is a wasteful number, since it uses less digits than its factorization.

663343423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1654624.

The product of its digits is 93312, while the sum is 34.

The square root of 663343423 is about 25755.4542378891. The cubic root of 663343423 is about 872.1264857167.

Adding to 663343423 its reverse (324343366), we get a palindrome (987686789).

The spelling of 663343423 in words is "six hundred sixty-three million, three hundred forty-three thousand, four hundred twenty-three".