11931903 has 12 divisors (see below), whose sum is σ = 17394520. Its totient is φ = 7880976.

The previous prime is 11931901. The next prime is 11931919. The reversal of 11931903 is 30913911.

It is not a de Polignac number, because 11931903 - 2¹ = 11931901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11931901) 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, 5101 + ... + 7062.

Almost surely, 2^11931903 is an apocalyptic number.

11931903 is a deficient number, since it is larger than the sum of its proper divisors (5462617).

11931903 is a wasteful number, since it uses less digits than its factorization.

11931903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12278 (or 12275 counting only the distinct ones).

The product of its (nonzero) digits is 729, while the sum is 27.

The square root of 11931903 is about 3454.2586758956. The cubic root of 11931903 is about 228.5089622642.

The spelling of 11931903 in words is "eleven million, nine hundred thirty-one thousand, nine hundred three".