64383709 has 12 divisors (see below), whose sum is σ = 73659124. Its totient is φ = 55931904.

The previous prime is 64383707. The next prime is 64383751. The reversal of 64383709 is 90738346.

It can be written as a sum of positive squares in 6 ways, for example, as 4088484 + 60295225 = 2022^2 + 7765^2 .

It is not a de Polignac number, because 64383709 - 2¹ = 64383707 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 (64383701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4812 + ... + 12325.

Almost surely, 2^64383709 is an apocalyptic number.

It is an amenable number.

64383709 is a deficient number, since it is larger than the sum of its proper divisors (9275415).

64383709 is a wasteful number, since it uses less digits than its factorization.

64383709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17184 (or 17167 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 64383709 is about 8023.9459743944. The cubic root of 64383709 is about 400.7978014741.

The spelling of 64383709 in words is "sixty-four million, three hundred eighty-three thousand, seven hundred nine".