6564993 has 4 divisors (see below), whose sum is σ = 8753328. Its totient is φ = 4376660.

The previous prime is 6564983. The next prime is 6564997. The reversal of 6564993 is 3994656.

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 a cyclic number.

It is not a de Polignac number, because 6564993 - 2⁴ = 6564977 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (6564997) 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, 1094163 + ... + 1094168.

It is an arithmetic number, because the mean of its divisors is an integer number (2188332).

Almost surely, 2^6564993 is an apocalyptic number.

It is an amenable number.

6564993 is a deficient number, since it is larger than the sum of its proper divisors (2188335).

6564993 is a wasteful number, since it uses less digits than its factorization.

6564993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2188334.

The product of its digits is 174960, while the sum is 42.

The square root of 6564993 is about 2562.2242290635. The cubic root of 6564993 is about 187.2455143093.

It can be divided in two parts, 6564 and 993, that added together give a palindrome (7557).

The spelling of 6564993 in words is "six million, five hundred sixty-four thousand, nine hundred ninety-three".