64047071 has 4 divisors (see below), whose sum is σ = 69869544. Its totient is φ = 58224600.

The previous prime is 64047047. The next prime is 64047073. The reversal of 64047071 is 17074046.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64047071 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 (64047073) 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 3 ways as a sum of consecutive naturals, for example, 2911220 + ... + 2911241.

It is an arithmetic number, because the mean of its divisors is an integer number (17467386).

Almost surely, 2^64047071 is an apocalyptic number.

64047071 is a deficient number, since it is larger than the sum of its proper divisors (5822473).

64047071 is a wasteful number, since it uses less digits than its factorization.

64047071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5822472.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 64047071 is about 8002.9413967616. The cubic root of 64047071 is about 400.0980405515.

The spelling of 64047071 in words is "sixty-four million, forty-seven thousand, seventy-one".