11831491 has 12 divisors (see below), whose sum is σ = 14208960. Its totient is φ = 9812880.

The previous prime is 11831483. The next prime is 11831497. The reversal of 11831491 is 19413811.

11831491 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11831491 - 2³ = 11831483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11831497) 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, 2376 + ... + 5413.

It is an arithmetic number, because the mean of its divisors is an integer number (1184080).

Almost surely, 2^11831491 is an apocalyptic number.

11831491 is a deficient number, since it is larger than the sum of its proper divisors (2377469).

11831491 is an equidigital number, since it uses as much as digits as its factorization.

11831491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7834 (or 7827 counting only the distinct ones).

The product of its digits is 864, while the sum is 28.

The square root of 11831491 is about 3439.6934456431. The cubic root of 11831491 is about 227.8661559266.

The spelling of 11831491 in words is "eleven million, eight hundred thirty-one thousand, four hundred ninety-one".