2116789 has 8 divisors (see below), whose sum is σ = 2296728. Its totient is φ = 1943040.

The previous prime is 2116783. The next prime is 2116799. The reversal of 2116789 is 9876112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 400689 + 1716100 = 633^2 + 1310^2 .

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 2116789 - 2⁵ = 2116757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2116783) 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, 822 + ... + 2215.

It is an arithmetic number, because the mean of its divisors is an integer number (287091).

2^2116789 is an apocalyptic number.

It is an amenable number.

2116789 is a deficient number, since it is larger than the sum of its proper divisors (179939).

2116789 is a wasteful number, since it uses less digits than its factorization.

2116789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3095.

The product of its digits is 6048, while the sum is 34.

The square root of 2116789 is about 1454.9188980833. The cubic root of 2116789 is about 128.3982752588.

The spelling of 2116789 in words is "two million, one hundred sixteen thousand, seven hundred eighty-nine".