2113891 has 8 divisors (see below), whose sum is σ = 2298240. Its totient is φ = 1932672.

The previous prime is 2113879. The next prime is 2113901. The reversal of 2113891 is 1983112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2113891 - 2⁹ = 2113379 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 (2113801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 750 + ... + 2188.

It is an arithmetic number, because the mean of its divisors is an integer number (287280).

2^2113891 is an apocalyptic number.

2113891 is a deficient number, since it is larger than the sum of its proper divisors (184349).

2113891 is a wasteful number, since it uses less digits than its factorization.

2113891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1565.

The product of its digits is 432, while the sum is 25.

The square root of 2113891 is about 1453.9226251765. The cubic root of 2113891 is about 128.3396537432.

The spelling of 2113891 in words is "two million, one hundred thirteen thousand, eight hundred ninety-one".