10991003 has 2 divisors, whose sum is σ = 10991004. Its totient is φ = 10991002.

The previous prime is 10990963. The next prime is 10991011. The reversal of 10991003 is 30019901.

10991003 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10991003 - 2⁶ = 10990939 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10991003.

It is not a weakly prime, because it can be changed into another prime (10991023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5495501 + 5495502.

It is an arithmetic number, because the mean of its divisors is an integer number (5495502).

Almost surely, 2^10991003 is an apocalyptic number.

10991003 is a deficient number, since it is larger than the sum of its proper divisors (1).

10991003 is an equidigital number, since it uses as much as digits as its factorization.

10991003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 243, while the sum is 23.

The square root of 10991003 is about 3315.2681641158. The cubic root of 10991003 is about 222.3373587340.

The spelling of 10991003 in words is "ten million, nine hundred ninety-one thousand, three".