64943 has 4 divisors (see below), whose sum is σ = 65688. Its totient is φ = 64200.

The previous prime is 64937. The next prime is 64951. The reversal of 64943 is 34946.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 64943 - 2⁴ = 64927 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 (60943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221 + ... + 422.

It is an arithmetic number, because the mean of its divisors is an integer number (16422).

2⁶⁴⁹⁴³ is an apocalyptic number.

64943 is a deficient number, since it is larger than the sum of its proper divisors (745).

64943 is a wasteful number, since it uses less digits than its factorization.

64943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744.

The product of its digits is 2592, while the sum is 26.

The square root of 64943 is about 254.8391649649. The cubic root of 64943 is about 40.1955012581.

The spelling of 64943 in words is "sixty-four thousand, nine hundred forty-three".