11831905 has 8 divisors (see below), whose sum is σ = 14217192. Its totient is φ = 9452928.

The previous prime is 11831873. The next prime is 11831917. The reversal of 11831905 is 50913811.

11831905 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 4498641 + 7333264 = 2121^2 + 2708^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11831905 - 2⁵ = 11831873 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5229 + ... + 7141.

It is an arithmetic number, because the mean of its divisors is an integer number (1777149).

Almost surely, 2^11831905 is an apocalyptic number.

It is an amenable number.

11831905 is a deficient number, since it is larger than the sum of its proper divisors (2385287).

11831905 is a wasteful number, since it uses less digits than its factorization.

11831905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3155.

The product of its (nonzero) digits is 1080, while the sum is 28.

The square root of 11831905 is about 3439.7536248982. The cubic root of 11831905 is about 227.8688136781.

It can be divided in two parts, 118 and 31905, that added together give a palindrome (32023).

The spelling of 11831905 in words is "eleven million, eight hundred thirty-one thousand, nine hundred five".