2106791 has 4 divisors (see below), whose sum is σ = 2174784. Its totient is φ = 2038800.

The previous prime is 2106781. The next prime is 2106809. The reversal of 2106791 is 1976012.

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 2106791 - 2¹⁰ = 2105767 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2106791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2106781) 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, 33950 + ... + 34011.

It is an arithmetic number, because the mean of its divisors is an integer number (543696).

2^2106791 is an apocalyptic number.

2106791 is a deficient number, since it is larger than the sum of its proper divisors (67993).

2106791 is an equidigital number, since it uses as much as digits as its factorization.

2106791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67992.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 2106791 is about 1451.4789009834. The cubic root of 2106791 is about 128.1958062723.

The spelling of 2106791 in words is "two million, one hundred six thousand, seven hundred ninety-one".