6464909 has 18 divisors (see below), whose sum is σ = 7501998. Its totient is φ = 5566000.

The previous prime is 6464891. The next prime is 6464917. The reversal of 6464909 is 9094646.

It can be written as a sum of positive squares in only one way, i.e., 6400900 + 64009 = 2530^2 + 253^2 .

It is a de Polignac number, because none of the positive numbers 2^k-6464909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6464989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 63959 + ... + 64059.

Almost surely, 2^6464909 is an apocalyptic number.

It is an amenable number.

6464909 is a deficient number, since it is larger than the sum of its proper divisors (1037089).

6464909 is a wasteful number, since it uses less digits than its factorization.

6464909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 6464909 is about 2542.6185321436. The cubic root of 6464909 is about 186.2891117957.

Multiplying 6464909 by its sum of digits (38), we get a palindrome (245666542).

It can be divided in two parts, 6464 and 909, that multiplied together give a square (5875776 = 2424²).

The spelling of 6464909 in words is "six million, four hundred sixty-four thousand, nine hundred nine".