2111873 has 2 divisors, whose sum is σ = 2111874. Its totient is φ = 2111872.

The previous prime is 2111861. The next prime is 2111897. The reversal of 2111873 is 3781112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1658944 + 452929 = 1288^2 + 673^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2111873 is a prime.

It is not a weakly prime, because it can be changed into another prime (2111803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055936 + 1055937.

It is an arithmetic number, because the mean of its divisors is an integer number (1055937).

2^2111873 is an apocalyptic number.

It is an amenable number.

2111873 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111873 is an equidigital number, since it uses as much as digits as its factorization.

2111873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336, while the sum is 23.

The square root of 2111873 is about 1453.2284748105. The cubic root of 2111873 is about 128.2988014509.

Adding to 2111873 its reverse (3781112), we get a palindrome (5892985).

The spelling of 2111873 in words is "two million, one hundred eleven thousand, eight hundred seventy-three".