2090971 has 4 divisors (see below), whose sum is σ = 2095632. Its totient is φ = 2086312.

The previous prime is 2090951. The next prime is 2090989. The reversal of 2090971 is 1790902.

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 2090971 - 2⁷ = 2090843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2090951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1576 + ... + 2581.

It is an arithmetic number, because the mean of its divisors is an integer number (523908).

2^2090971 is an apocalyptic number.

2090971 is a deficient number, since it is larger than the sum of its proper divisors (4661).

2090971 is an equidigital number, since it uses as much as digits as its factorization.

2090971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4660.

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 2090971 is about 1446.0190178556. The cubic root of 2090971 is about 127.8741234854.

The spelling of 2090971 in words is "two million, ninety thousand, nine hundred seventy-one".