2111913 has 14 divisors (see below), whose sum is σ = 3167514. Its totient is φ = 1407456.

The previous prime is 2111909. The next prime is 2111917. The reversal of 2111913 is 3191112.

It is an interprime number because it is at equal distance from previous prime (2111909) and next prime (2111917).

It can be written as a sum of positive squares in only one way, i.e., 1411344 + 700569 = 1188^2 + 837^2 .

It is not a de Polignac number, because 2111913 - 2² = 2111909 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2111917) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 720 + ... + 2177.

It is an arithmetic number, because the mean of its divisors is an integer number (226251).

2^2111913 is an apocalyptic number.

It is an amenable number.

2111913 is a deficient number, since it is larger than the sum of its proper divisors (1055601).

2111913 is an frugal number, since it uses more digits than its factorization.

2111913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2915 (or 2900 counting only the distinct ones).

The product of its digits is 54, while the sum is 18.

The square root of 2111913 is about 1453.2422372062. The cubic root of 2111913 is about 128.2996114617.

The spelling of 2111913 in words is "two million, one hundred eleven thousand, nine hundred thirteen".