6623543 has 4 divisors (see below), whose sum is σ = 6634488. Its totient is φ = 6612600.

The previous prime is 6623531. The next prime is 6623549. The reversal of 6623543 is 3453266.

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 6623543 - 2¹⁶ = 6558007 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 (6623549) 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 3 ways as a sum of consecutive naturals, for example, 4508 + ... + 5793.

It is an arithmetic number, because the mean of its divisors is an integer number (1658622).

Almost surely, 2^6623543 is an apocalyptic number.

6623543 is a deficient number, since it is larger than the sum of its proper divisors (10945).

6623543 is a wasteful number, since it uses less digits than its factorization.

6623543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10944.

The product of its digits is 12960, while the sum is 29.

The square root of 6623543 is about 2573.6244869833. The cubic root of 6623543 is about 187.8005183787.

The spelling of 6623543 in words is "six million, six hundred twenty-three thousand, five hundred forty-three".