11879891 has 4 divisors (see below), whose sum is σ = 12396432. Its totient is φ = 11363352.

The previous prime is 11879887. The next prime is 11879893. The reversal of 11879891 is 19897811.

11879891 is digitally balanced in base 3, 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, and also an emirpimes, since its reverse is a distinct semiprime: 19897811 = 199 ⋅99989.

It is a cyclic number.

It is not a de Polignac number, because 11879891 - 2² = 11879887 is a prime.

It is a super-2 number, since 2×11879891² = 282263620343762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11879893) 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, 258236 + ... + 258281.

It is an arithmetic number, because the mean of its divisors is an integer number (3099108).

Almost surely, 2^11879891 is an apocalyptic number.

11879891 is a deficient number, since it is larger than the sum of its proper divisors (516541).

11879891 is an equidigital number, since it uses as much as digits as its factorization.

11879891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516540.

The product of its digits is 36288, while the sum is 44.

The square root of 11879891 is about 3446.7217758328. The cubic root of 11879891 is about 228.1764497954.

The spelling of 11879891 in words is "eleven million, eight hundred seventy-nine thousand, eight hundred ninety-one".