2189783 has 2 divisors, whose sum is σ = 2189784. Its totient is φ = 2189782.

The previous prime is 2189767. The next prime is 2189791. The reversal of 2189783 is 3879812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2189783 - 2⁴ = 2189767 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2189713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1094891 + 1094892.

It is an arithmetic number, because the mean of its divisors is an integer number (1094892).

2^2189783 is an apocalyptic number.

2189783 is a deficient number, since it is larger than the sum of its proper divisors (1).

2189783 is an equidigital number, since it uses as much as digits as its factorization.

2189783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 38.

The square root of 2189783 is about 1479.7915393730. The cubic root of 2189783 is about 129.8574967079.

It can be divided in two parts, 218 and 9783, that added together give a palindrome (10001).

The spelling of 2189783 in words is "two million, one hundred eighty-nine thousand, seven hundred eighty-three".