11831487 has 4 divisors (see below), whose sum is σ = 15775320. Its totient is φ = 7887656.

The previous prime is 11831483. The next prime is 11831497. The reversal of 11831487 is 78413811.

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

It is a cyclic number.

It is not a de Polignac number, because 11831487 - 2² = 11831483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11831483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1971912 + ... + 1971917.

It is an arithmetic number, because the mean of its divisors is an integer number (3943830).

Almost surely, 2^11831487 is an apocalyptic number.

11831487 is a deficient number, since it is larger than the sum of its proper divisors (3943833).

11831487 is an equidigital number, since it uses as much as digits as its factorization.

11831487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3943832.

The product of its digits is 5376, while the sum is 33.

The square root of 11831487 is about 3439.6928641959. The cubic root of 11831487 is about 227.8661302475.

The spelling of 11831487 in words is "eleven million, eight hundred thirty-one thousand, four hundred eighty-seven".