6631423 has 4 divisors (see below), whose sum is σ = 6743880. Its totient is φ = 6518968.

The previous prime is 6631421. The next prime is 6631447. The reversal of 6631423 is 3241366.

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

It is a cyclic number.

It is not a de Polignac number, because 6631423 - 2¹ = 6631421 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 (6631421) 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, 56140 + ... + 56257.

It is an arithmetic number, because the mean of its divisors is an integer number (1685970).

Almost surely, 2^6631423 is an apocalyptic number.

6631423 is a deficient number, since it is larger than the sum of its proper divisors (112457).

6631423 is a wasteful number, since it uses less digits than its factorization.

6631423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112456.

The product of its digits is 2592, while the sum is 25.

The square root of 6631423 is about 2575.1549467945. The cubic root of 6631423 is about 187.8749640144.

Adding to 6631423 its reverse (3241366), we get a palindrome (9872789).

The spelling of 6631423 in words is "six million, six hundred thirty-one thousand, four hundred twenty-three".