2109913 has 8 divisors (see below), whose sum is σ = 2294600. Its totient is φ = 1928448.

The previous prime is 2109911. The next prime is 2109941. The reversal of 2109913 is 3199012.

It can be written as a sum of positive squares in 4 ways, for example, as 44944 + 2064969 = 212^2 + 1437^2 .

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 2109913 - 2¹ = 2109911 is a prime.

It is a super-3 number, since 3×2109913³ = 28178307149433334491, which contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2109911) 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, 673 + ... + 2161.

It is an arithmetic number, because the mean of its divisors is an integer number (286825).

2^2109913 is an apocalyptic number.

It is an amenable number.

2109913 is a deficient number, since it is larger than the sum of its proper divisors (184687).

2109913 is a wasteful number, since it uses less digits than its factorization.

2109913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1611.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 2109913 is about 1452.5539576897. The cubic root of 2109913 is about 128.2590983872.

It can be divided in two parts, 21099 and 13, that added together give a palindrome (21112).

The spelling of 2109913 in words is "two million, one hundred nine thousand, nine hundred thirteen".