1091003 has 2 divisors, whose sum is σ = 1091004. Its totient is φ = 1091002.

The previous prime is 1090997. The next prime is 1091017. The reversal of 1091003 is 3001901.

It is an a-pointer prime, because the next prime (1091017) can be obtained adding 1091003 to its sum of digits (14).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1091003 - 2⁶ = 1090939 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1091023) 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 as a sum of consecutive naturals, namely, 545501 + 545502.

It is an arithmetic number, because the mean of its divisors is an integer number (545502).

2^1091003 is an apocalyptic number.

1091003 is a deficient number, since it is larger than the sum of its proper divisors (1).

1091003 is an equidigital number, since it uses as much as digits as its factorization.

1091003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27, while the sum is 14.

The square root of 1091003 is about 1044.5108903214. The cubic root of 1091003 is about 102.9458036431.

Adding to 1091003 its reverse (3001901), we get a palindrome (4092904).

The spelling of 1091003 in words is "one million, ninety-one thousand, three".