659443 has 4 divisors (see below), whose sum is σ = 670680. Its totient is φ = 648208.

The previous prime is 659437. The next prime is 659453. The reversal of 659443 is 344956.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 659443 - 2¹³ = 651251 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a d-powerful number, because it can be written as 6² + 5⁵ + 4⁴ + 9⁵ + 4⁸ + 3¹² .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (659423) 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, 5530 + ... + 5647.

It is an arithmetic number, because the mean of its divisors is an integer number (167670).

2⁶⁵⁹⁴⁴³ is an apocalyptic number.

659443 is a deficient number, since it is larger than the sum of its proper divisors (11237).

659443 is a wasteful number, since it uses less digits than its factorization.

659443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11236.

The product of its digits is 12960, while the sum is 31.

The square root of 659443 is about 812.0609583030. The cubic root of 659443 is about 87.0413772439.

The spelling of 659443 in words is "six hundred fifty-nine thousand, four hundred forty-three".