6563923 has 6 divisors (see below), whose sum is σ = 6683244. Its totient is φ = 6445296.

The previous prime is 6563867. The next prime is 6563929. The reversal of 6563923 is 3293656.

It is not a de Polignac number, because 6563923 - 2²¹ = 4466771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6563929) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20815 + ... + 21127.

It is an arithmetic number, because the mean of its divisors is an integer number (1113874).

Almost surely, 2^6563923 is an apocalyptic number.

6563923 is a deficient number, since it is larger than the sum of its proper divisors (119321).

6563923 is an frugal number, since it uses more digits than its factorization.

6563923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693 (or 380 counting only the distinct ones).

The product of its digits is 29160, while the sum is 34.

The square root of 6563923 is about 2562.0154175961. The cubic root of 6563923 is about 187.2353409760.

The spelling of 6563923 in words is "six million, five hundred sixty-three thousand, nine hundred twenty-three".