64044005 has 4 divisors (see below), whose sum is σ = 76852812. Its totient is φ = 51235200.

The previous prime is 64043989. The next prime is 64044017. The reversal of 64044005 is 50044046.

It is a happy number.

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 49098049 + 14945956 = 7007^2 + 3866^2 .

It is not a de Polignac number, because 64044005 - 2⁴ = 64043989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6404396 + ... + 6404405.

It is an arithmetic number, because the mean of its divisors is an integer number (19213203).

Almost surely, 2^64044005 is an apocalyptic number.

It is an amenable number.

64044005 is a deficient number, since it is larger than the sum of its proper divisors (12808807).

64044005 is a wasteful number, since it uses less digits than its factorization.

64044005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12808806.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 64044005 is about 8002.7498398988. The cubic root of 64044005 is about 400.0916560796.

The spelling of 64044005 in words is "sixty-four million, forty-four thousand, five".