64271447 has 4 divisors (see below), whose sum is σ = 64597896. Its totient is φ = 63945000.

The previous prime is 64271443. The next prime is 64271497. The reversal of 64271447 is 74417246.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74417246 = 2 ⋅37208623.

It is a cyclic number.

It is not a de Polignac number, because 64271447 - 2² = 64271443 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 (64271443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162929 + ... + 163322.

It is an arithmetic number, because the mean of its divisors is an integer number (16149474).

Almost surely, 2^64271447 is an apocalyptic number.

64271447 is a deficient number, since it is larger than the sum of its proper divisors (326449).

64271447 is a wasteful number, since it uses less digits than its factorization.

64271447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326448.

The product of its digits is 37632, while the sum is 35.

The square root of 64271447 is about 8016.9474864190. The cubic root of 64271447 is about 400.5647169451.

The spelling of 64271447 in words is "sixty-four million, two hundred seventy-one thousand, four hundred forty-seven".