6564969 has 10 divisors (see below), whose sum is σ = 9807050. Its totient is φ = 4376592.

The previous prime is 6564967. The next prime is 6564973. The reversal of 6564969 is 9694656.

It can be written as a sum of positive squares in only one way, i.e., 4359744 + 2205225 = 2088^2 + 1485^2 .

It is not a de Polignac number, because 6564969 - 2¹ = 6564967 is a prime.

It is a super-2 number, since 2×6564969² = 86197635941922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6564967) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 40444 + ... + 40605.

It is an arithmetic number, because the mean of its divisors is an integer number (980705).

Almost surely, 2^6564969 is an apocalyptic number.

It is an amenable number.

6564969 is a deficient number, since it is larger than the sum of its proper divisors (3242081).

6564969 is an equidigital number, since it uses as much as digits as its factorization.

6564969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81061 (or 81052 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 6564969 is about 2562.2195456284. The cubic root of 6564969 is about 187.2452861345.

Subtracting from 6564969 its product of digits (349920), we obtain a square (6215049 = 2493²).

It can be divided in two parts, 656 and 4969, that added together give a square (5625 = 75²).

The spelling of 6564969 in words is "six million, five hundred sixty-four thousand, nine hundred sixty-nine".