2090321 has 4 divisors (see below), whose sum is σ = 2104500. Its totient is φ = 2076144.

The previous prime is 2090317. The next prime is 2090327. The reversal of 2090321 is 1230902.

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

It can be written as a sum of positive squares in 2 ways, for example, as 130321 + 1960000 = 361^2 + 1400^2 .

It is a cyclic number.

It is not a de Polignac number, because 2090321 - 2² = 2090317 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 2090321.

It is not an unprimeable number, because it can be changed into a prime (2090327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6866 + ... + 7163.

It is an arithmetic number, because the mean of its divisors is an integer number (526125).

2^2090321 is an apocalyptic number.

It is an amenable number.

2090321 is a deficient number, since it is larger than the sum of its proper divisors (14179).

2090321 is a wasteful number, since it uses less digits than its factorization.

2090321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14178.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 2090321 is about 1445.7942453890. The cubic root of 2090321 is about 127.8608717801.

The spelling of 2090321 in words is "two million, ninety thousand, three hundred twenty-one".