64543 has 8 divisors (see below), whose sum is σ = 70400. Its totient is φ = 58968.

The previous prime is 64513. The next prime is 64553. The reversal of 64543 is 34546.

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-64543 is a prime.

It is a super-3 number, since 3×64543³ = 806619465333021, which contains 333 as substring.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 778 + ... + 856.

It is an arithmetic number, because the mean of its divisors is an integer number (8800).

2⁶⁴⁵⁴³ is an apocalyptic number.

64543 is a deficient number, since it is larger than the sum of its proper divisors (5857).

64543 is a wasteful number, since it uses less digits than its factorization.

64543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141.

The product of its digits is 1440, while the sum is 22.

The square root of 64543 is about 254.0531440467. The cubic root of 64543 is about 40.1128065679.

The spelling of 64543 in words is "sixty-four thousand, five hundred forty-three".