64064009 has 4 divisors (see below), whose sum is σ = 64123716. Its totient is φ = 64004304.

The previous prime is 64063981. The next prime is 64064051. The reversal of 64064009 is 90046046.

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

It can be written as a sum of positive squares in 2 ways, for example, as 63552784 + 511225 = 7972^2 + 715^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64064009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64064059) 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 3 ways as a sum of consecutive naturals, for example, 28214 + ... + 30399.

It is an arithmetic number, because the mean of its divisors is an integer number (16030929).

Almost surely, 2^64064009 is an apocalyptic number.

It is an amenable number.

64064009 is a deficient number, since it is larger than the sum of its proper divisors (59707).

64064009 is a wasteful number, since it uses less digits than its factorization.

64064009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59706.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 64064009 is about 8003.9995627186. Note that the first 3 decimals coincide. The cubic root of 64064009 is about 400.1333076511.

The spelling of 64064009 in words is "sixty-four million, sixty-four thousand, nine".