11312003 has 4 divisors (see below), whose sum is σ = 11348688. Its totient is φ = 11275320.

The previous prime is 11311999. The next prime is 11312009. The reversal of 11312003 is 30021311.

11312003 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11312003 - 2² = 11311999 is a prime.

It is a super-2 number, since 2×11312003² = 255922823744018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11312009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17876 + ... + 18497.

It is an arithmetic number, because the mean of its divisors is an integer number (2837172).

Almost surely, 2^11312003 is an apocalyptic number.

11312003 is a deficient number, since it is larger than the sum of its proper divisors (36685).

11312003 is an equidigital number, since it uses as much as digits as its factorization.

11312003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36684.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 11312003 is about 3363.3321275188. The cubic root of 11312003 is about 224.4811286330.

Adding to 11312003 its reverse (30021311), we get a palindrome (41333314).

The spelling of 11312003 in words is "eleven million, three hundred twelve thousand, three".