64993443 has 8 divisors (see below), whose sum is σ = 86701056. Its totient is φ = 43307400.

The previous prime is 64993441. The next prime is 64993451. The reversal of 64993443 is 34439946.

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

It is not a de Polignac number, because 64993443 - 2¹ = 64993441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64993395 and 64993404.

It is not an unprimeable number, because it can be changed into a prime (64993441) 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 7 ways as a sum of consecutive naturals, for example, 3958 + ... + 12068.

It is an arithmetic number, because the mean of its divisors is an integer number (10837632).

Almost surely, 2^64993443 is an apocalyptic number.

64993443 is a deficient number, since it is larger than the sum of its proper divisors (21707613).

64993443 is a wasteful number, since it uses less digits than its factorization.

64993443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10785.

The product of its digits is 279936, while the sum is 42.

The square root of 64993443 is about 8061.8510901653. The cubic root of 64993443 is about 402.0590554562.

The spelling of 64993443 in words is "sixty-four million, nine hundred ninety-three thousand, four hundred forty-three".