2121683 has 2 divisors, whose sum is σ = 2121684. Its totient is φ = 2121682.

The previous prime is 2121667. The next prime is 2121737. The reversal of 2121683 is 3861212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121683 - 2⁴ = 2121667 is a prime.

It is not a weakly prime, because it can be changed into another prime (2121653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060841 + 1060842.

It is an arithmetic number, because the mean of its divisors is an integer number (1060842).

2^2121683 is an apocalyptic number.

2121683 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121683 is an equidigital number, since it uses as much as digits as its factorization.

2121683 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 23.

The square root of 2121683 is about 1456.5998077715. The cubic root of 2121683 is about 128.4971510418.

Adding to 2121683 its reverse (3861212), we get a palindrome (5982895).

The spelling of 2121683 in words is "two million, one hundred twenty-one thousand, six hundred eighty-three".