1116803621 has 2 divisors, whose sum is σ = 1116803622. Its totient is φ = 1116803620.

The previous prime is 1116803581. The next prime is 1116803647. The reversal of 1116803621 is 1263086111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1090650625 + 26152996 = 33025^2 + 5114^2 .

It is a cyclic number.

It is not a de Polignac number, because 1116803621 - 2⁶ = 1116803557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1116808621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 558401810 + 558401811.

It is an arithmetic number, because the mean of its divisors is an integer number (558401811).

Almost surely, 2^1116803621 is an apocalyptic number.

It is an amenable number.

1116803621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1116803621 is an equidigital number, since it uses as much as digits as its factorization.

1116803621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 1116803621 is about 33418.6118951700. The cubic root of 1116803621 is about 1037.5099517311.

Adding to 1116803621 its reverse (1263086111), we get a palindrome (2379889732).

The spelling of 1116803621 in words is "one billion, one hundred sixteen million, eight hundred three thousand, six hundred twenty-one".