11877891 has 4 divisors (see below), whose sum is σ = 15837192. Its totient is φ = 7918592.

The previous prime is 11877889. The next prime is 11877893. The reversal of 11877891 is 19877811.

It is a happy number.

11877891 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 an interprime number because it is at equal distance from previous prime (11877889) and next prime (11877893).

It is a cyclic number.

It is not a de Polignac number, because 11877891 - 2¹ = 11877889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11877893) 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, 1979646 + ... + 1979651.

It is an arithmetic number, because the mean of its divisors is an integer number (3959298).

Almost surely, 2^11877891 is an apocalyptic number.

11877891 is a deficient number, since it is larger than the sum of its proper divisors (3959301).

11877891 is an equidigital number, since it uses as much as digits as its factorization.

11877891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3959300.

The product of its digits is 28224, while the sum is 42.

The square root of 11877891 is about 3446.4316328632. The cubic root of 11877891 is about 228.1636444447.

The spelling of 11877891 in words is "eleven million, eight hundred seventy-seven thousand, eight hundred ninety-one".