6446423 has 4 divisors (see below), whose sum is σ = 6453168. Its totient is φ = 6439680.

The previous prime is 6446413. The next prime is 6446437. The reversal of 6446423 is 3246446.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6446423 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 (6446413) 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 3 ways as a sum of consecutive naturals, for example, 1643 + ... + 3948.

It is an arithmetic number, because the mean of its divisors is an integer number (1613292).

Almost surely, 2^6446423 is an apocalyptic number.

6446423 is a deficient number, since it is larger than the sum of its proper divisors (6745).

6446423 is a wasteful number, since it uses less digits than its factorization.

6446423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6744.

The product of its digits is 13824, while the sum is 29.

The square root of 6446423 is about 2538.9807009901. The cubic root of 6446423 is about 186.1113816255. Note that the first 3 decimals are identical.

The spelling of 6446423 in words is "six million, four hundred forty-six thousand, four hundred twenty-three".