2109813 has 8 divisors (see below), whose sum is σ = 2935488. Its totient is φ = 1345344.

The previous prime is 2109799. The next prime is 2109841. The reversal of 2109813 is 3189012.

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

It is not a de Polignac number, because 2109813 - 2⁴ = 2109797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2109013) 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, 15220 + ... + 15357.

It is an arithmetic number, because the mean of its divisors is an integer number (366936).

2^2109813 is an apocalyptic number.

2109813 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

2109813 is a deficient number, since it is larger than the sum of its proper divisors (825675).

2109813 is a wasteful number, since it uses less digits than its factorization.

2109813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30603.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 2109813 is about 1452.5195351526. The cubic root of 2109813 is about 128.2570720616.

The spelling of 2109813 in words is "two million, one hundred nine thousand, eight hundred thirteen".