64443217 has 8 divisors (see below), whose sum is σ = 67334400. Its totient is φ = 61559520.

The previous prime is 64443187. The next prime is 64443227. The reversal of 64443217 is 71234446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64443217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64443227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22792 + ... + 25462.

It is an arithmetic number, because the mean of its divisors is an integer number (8416800).

Almost surely, 2^64443217 is an apocalyptic number.

It is an amenable number.

64443217 is a deficient number, since it is larger than the sum of its proper divisors (2891183).

64443217 is a wasteful number, since it uses less digits than its factorization.

64443217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3743.

The product of its digits is 16128, while the sum is 31.

The square root of 64443217 is about 8027.6532685462. The cubic root of 64443217 is about 400.9212453885.

The spelling of 64443217 in words is "sixty-four million, four hundred forty-three thousand, two hundred seventeen".