6464609 has 2 divisors, whose sum is σ = 6464610. Its totient is φ = 6464608.

The previous prime is 6464567. The next prime is 6464611. The reversal of 6464609 is 9064646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4963984 + 1500625 = 2228^2 + 1225^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6464609 is a prime.

Together with 6464611, it forms a pair of twin primes.

It is a Chen prime.

It is a d-powerful number, because it can be written as 6³ + 4⁴ + 6⁴ + 4⁴ + 6⁸ + 0 + 9⁷ .

It is not a weakly prime, because it can be changed into another prime (6464639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3232304 + 3232305.

It is an arithmetic number, because the mean of its divisors is an integer number (3232305).

Almost surely, 2^6464609 is an apocalyptic number.

It is an amenable number.

6464609 is a deficient number, since it is larger than the sum of its proper divisors (1).

6464609 is an equidigital number, since it uses as much as digits as its factorization.

6464609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 6464609 is about 2542.5595371594. The cubic root of 6464609 is about 186.2862302085.

The spelling of 6464609 in words is "six million, four hundred sixty-four thousand, six hundred nine".