11945903 has 4 divisors (see below), whose sum is σ = 11986968. Its totient is φ = 11904840.

The previous prime is 11945897. The next prime is 11945909. The reversal of 11945903 is 30954911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30954911 = 13 ⋅2381147.

It is an interprime number because it is at equal distance from previous prime (11945897) and next prime (11945909).

It is a cyclic number.

It is not a de Polignac number, because 11945903 - 2⁶ = 11945839 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 11945903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11945909) 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, 20093 + ... + 20678.

It is an arithmetic number, because the mean of its divisors is an integer number (2996742).

Almost surely, 2^11945903 is an apocalyptic number.

11945903 is a deficient number, since it is larger than the sum of its proper divisors (41065).

11945903 is an equidigital number, since it uses as much as digits as its factorization.

11945903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41064.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 11945903 is about 3456.2845658308. The cubic root of 11945903 is about 228.5982990918.

The spelling of 11945903 in words is "eleven million, nine hundred forty-five thousand, nine hundred three".