11491203 has 4 divisors (see below), whose sum is σ = 15321608. Its totient is φ = 7660800.

The previous prime is 11491199. The next prime is 11491217. The reversal of 11491203 is 30219411.

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

It is not a de Polignac number, because 11491203 - 2² = 11491199 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11491203.

It is not an unprimeable number, because it can be changed into a prime (11491223) 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, 1915198 + ... + 1915203.

It is an arithmetic number, because the mean of its divisors is an integer number (3830402).

Almost surely, 2^11491203 is an apocalyptic number.

11491203 is a deficient number, since it is larger than the sum of its proper divisors (3830405).

11491203 is an equidigital number, since it uses as much as digits as its factorization.

11491203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3830404.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 11491203 is about 3389.8676965333. The cubic root of 11491203 is about 225.6603023058.

The spelling of 11491203 in words is "eleven million, four hundred ninety-one thousand, two hundred three".