11231987 has 16 divisors (see below), whose sum is σ = 12595968. Its totient is φ = 9948960.

The previous prime is 11231959. The next prime is 11231989. The reversal of 11231987 is 78913211.

It is a cyclic number.

It is not a de Polignac number, because 11231987 - 2⁶ = 11231923 is a prime.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (11231989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39548 + ... + 39830.

It is an arithmetic number, because the mean of its divisors is an integer number (787248).

Almost surely, 2^11231987 is an apocalyptic number.

11231987 is a deficient number, since it is larger than the sum of its proper divisors (1363981).

11231987 is a wasteful number, since it uses less digits than its factorization.

11231987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410.

The product of its digits is 3024, while the sum is 32.

The square root of 11231987 is about 3351.4156710262. The cubic root of 11231987 is about 223.9505830083.

The spelling of 11231987 in words is "eleven million, two hundred thirty-one thousand, nine hundred eighty-seven".