2149879111 has 4 divisors (see below), whose sum is σ = 2186317800. Its totient is φ = 2113440424.

The previous prime is 2149879037. The next prime is 2149879129. The reversal of 2149879111 is 1119789412.

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 2149879111 - 2²³ = 2141490503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2149879411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18219256 + ... + 18219373.

It is an arithmetic number, because the mean of its divisors is an integer number (546579450).

Almost surely, 2^2149879111 is an apocalyptic number.

2149879111 is a deficient number, since it is larger than the sum of its proper divisors (36438689).

2149879111 is an equidigital number, since it uses as much as digits as its factorization.

2149879111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36438688.

The product of its digits is 36288, while the sum is 43.

The square root of 2149879111 is about 46366.7888795418. The cubic root of 2149879111 is about 1290.6386899966.

The spelling of 2149879111 in words is "two billion, one hundred forty-nine million, eight hundred seventy-nine thousand, one hundred eleven".