2169091 has 4 divisors (see below), whose sum is σ = 2172384. Its totient is φ = 2165800.

The previous prime is 2169073. The next prime is 2169109. The reversal of 2169091 is 1909612.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2169073) and next prime (2169109).

It is a cyclic number.

It is not a de Polignac number, because 2169091 - 2¹⁷ = 2038019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2169031) 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 3 ways as a sum of consecutive naturals, for example, 280 + ... + 2101.

It is an arithmetic number, because the mean of its divisors is an integer number (543096).

2^2169091 is an apocalyptic number.

2169091 is a deficient number, since it is larger than the sum of its proper divisors (3293).

2169091 is an equidigital number, since it uses as much as digits as its factorization.

2169091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3292.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 2169091 is about 1472.7834192440. The cubic root of 2169091 is about 129.4471791061.

The spelling of 2169091 in words is "two million, one hundred sixty-nine thousand, ninety-one".