2090813 has 8 divisors (see below), whose sum is σ = 2290680. Its totient is φ = 1899520.

The previous prime is 2090807. The next prime is 2090821. The reversal of 2090813 is 3180902.

It can be written as a sum of positive squares in 4 ways, for example, as 1249924 + 840889 = 1118^2 + 917^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2090813 - 2⁶ = 2090749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2090843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1628 + ... + 2613.

It is an arithmetic number, because the mean of its divisors is an integer number (286335).

2^2090813 is an apocalyptic number.

It is an amenable number.

2090813 is a deficient number, since it is larger than the sum of its proper divisors (199867).

2090813 is a wasteful number, since it uses less digits than its factorization.

2090813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4287.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 2090813 is about 1445.9643840704. The cubic root of 2090813 is about 127.8709025543.

The spelling of 2090813 in words is "two million, ninety thousand, eight hundred thirteen".