11813003 has 12 divisors (see below), whose sum is σ = 12774168. Its totient is φ = 10916640.

The previous prime is 11812991. The next prime is 11813017. The reversal of 11813003 is 30031811.

It is not a de Polignac number, because 11813003 - 2⁴ = 11812987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11813033) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15143 + ... + 15903.

It is an arithmetic number, because the mean of its divisors is an integer number (1064514).

Almost surely, 2^11813003 is an apocalyptic number.

11813003 is a deficient number, since it is larger than the sum of its proper divisors (961165).

11813003 is an equidigital number, since it uses as much as digits as its factorization.

11813003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842 (or 823 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 11813003 is about 3437.0049461704. The cubic root of 11813003 is about 227.7474054464.

Adding to 11813003 its reverse (30031811), we get a palindrome (41844814).

The spelling of 11813003 in words is "eleven million, eight hundred thirteen thousand, three".