654443 has 4 divisors (see below), whose sum is σ = 677040. Its totient is φ = 631848.

The previous prime is 654439. The next prime is 654491. The reversal of 654443 is 344456.

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 654443 - 2² = 654439 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (654413) 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, 11255 + ... + 11312.

It is an arithmetic number, because the mean of its divisors is an integer number (169260).

2⁶⁵⁴⁴⁴³ is an apocalyptic number.

654443 is a deficient number, since it is larger than the sum of its proper divisors (22597).

654443 is a wasteful number, since it uses less digits than its factorization.

654443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22596.

The product of its digits is 5760, while the sum is 26.

The square root of 654443 is about 808.9765138742. The cubic root of 654443 is about 86.8208317843.

Adding to 654443 its reverse (344456), we get a palindrome (998899).

The spelling of 654443 in words is "six hundred fifty-four thousand, four hundred forty-three".