6621103 has 2 divisors, whose sum is σ = 6621104. Its totient is φ = 6621102.

The previous prime is 6621071. The next prime is 6621119. The reversal of 6621103 is 3011266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6621103 - 2⁵ = 6621071 is a prime.

6621103 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6621163) 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 as a sum of consecutive naturals, namely, 3310551 + 3310552.

It is an arithmetic number, because the mean of its divisors is an integer number (3310552).

Almost surely, 2^6621103 is an apocalyptic number.

6621103 is a deficient number, since it is larger than the sum of its proper divisors (1).

6621103 is an equidigital number, since it uses as much as digits as its factorization.

6621103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 6621103 is about 2573.1504036881. The cubic root of 6621103 is about 187.7774547130. Note that the first 3 decimals are identical.

Adding to 6621103 its reverse (3011266), we get a palindrome (9632369).

It can be divided in two parts, 6621 and 103, that added together give a square (6724 = 82²).

The spelling of 6621103 in words is "six million, six hundred twenty-one thousand, one hundred three".