11965987 has 4 divisors (see below), whose sum is σ = 13053816. Its totient is φ = 10878160.

The previous prime is 11965979. The next prime is 11966023. The reversal of 11965987 is 78956911.

It is a happy number.

11965987 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 not a de Polignac number, because 11965987 - 2³ = 11965979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11965087) 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, 543898 + ... + 543919.

It is an arithmetic number, because the mean of its divisors is an integer number (3263454).

Almost surely, 2^11965987 is an apocalyptic number.

11965987 is a deficient number, since it is larger than the sum of its proper divisors (1087829).

11965987 is a wasteful number, since it uses less digits than its factorization.

11965987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087828.

The product of its digits is 136080, while the sum is 46.

The square root of 11965987 is about 3459.1887777339. The cubic root of 11965987 is about 228.7263373455.

The spelling of 11965987 in words is "eleven million, nine hundred sixty-five thousand, nine hundred eighty-seven".