64003809 has 16 divisors (see below), whose sum is σ = 88801280. Its totient is φ = 40960080.

The previous prime is 64003757. The next prime is 64003813. The reversal of 64003809 is 90830046.

It is not a de Polignac number, because 64003809 - 2⁹ = 64003297 is a prime.

It is a super-3 number, since 3×64003809³ (a number of 24 digits) contains 333 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 (64003859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9102 + ... + 14520.

It is an arithmetic number, because the mean of its divisors is an integer number (5550080).

Almost surely, 2^64003809 is an apocalyptic number.

It is an amenable number.

64003809 is a deficient number, since it is larger than the sum of its proper divisors (24797471).

64003809 is a wasteful number, since it uses less digits than its factorization.

64003809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5580.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 64003809 is about 8000.2380589580. The cubic root of 64003809 is about 400.0079352592.

The spelling of 64003809 in words is "sixty-four million, three thousand, eight hundred nine".