2669891 has 4 divisors (see below), whose sum is σ = 3051312. Its totient is φ = 2288472.

The previous prime is 2669881. The next prime is 2669897. The reversal of 2669891 is 1989662.

2669891 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, and also an emirpimes, since its reverse is a distinct semiprime: 1989662 = 2 ⋅994831.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2669891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2669897) 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, 190700 + ... + 190713.

It is an arithmetic number, because the mean of its divisors is an integer number (762828).

2^2669891 is an apocalyptic number.

2669891 is a deficient number, since it is larger than the sum of its proper divisors (381421).

2669891 is an equidigital number, since it uses as much as digits as its factorization.

2669891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381420.

The product of its digits is 46656, while the sum is 41.

The square root of 2669891 is about 1633.9801100381. The cubic root of 2669891 is about 138.7281230557.

The spelling of 2669891 in words is "two million, six hundred sixty-nine thousand, eight hundred ninety-one".