6564938 has 4 divisors (see below), whose sum is σ = 9847410. Its totient is φ = 3282468.

The previous prime is 6564919. The next prime is 6564967. The reversal of 6564938 is 8394656.

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

It can be written as a sum of positive squares in only one way, i.e., 5303809 + 1261129 = 2303^2 + 1123^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6564895 and 6564904.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1641233 + ... + 1641236.

Almost surely, 2^6564938 is an apocalyptic number.

6564938 is a deficient number, since it is larger than the sum of its proper divisors (3282472).

6564938 is a wasteful number, since it uses less digits than its factorization.

6564938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3282471.

The product of its digits is 155520, while the sum is 41.

The square root of 6564938 is about 2562.2134961786. The cubic root of 6564938 is about 187.2449914079.

The spelling of 6564938 in words is "six million, five hundred sixty-four thousand, nine hundred thirty-eight".