11941987 has 4 divisors (see below), whose sum is σ = 12110256. Its totient is φ = 11773720.

The previous prime is 11941981. The next prime is 11942011. The reversal of 11941987 is 78914911.

11941987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11941987 is a prime.

It is a super-2 number, since 2×11941987² = 285222107016338, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11941981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84028 + ... + 84169.

It is an arithmetic number, because the mean of its divisors is an integer number (3027564).

Almost surely, 2^11941987 is an apocalyptic number.

11941987 is a deficient number, since it is larger than the sum of its proper divisors (168269).

11941987 is an equidigital number, since it uses as much as digits as its factorization.

11941987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168268.

The product of its digits is 18144, while the sum is 40.

The square root of 11941987 is about 3455.7180151164. The cubic root of 11941987 is about 228.5733173393.

The spelling of 11941987 in words is "eleven million, nine hundred forty-one thousand, nine hundred eighty-seven".