2836781 has 2 divisors, whose sum is σ = 2836782. Its totient is φ = 2836780.

The previous prime is 2836777. The next prime is 2836789. The reversal of 2836781 is 1876382.

2836781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2402500 + 434281 = 1550^2 + 659^2 .

It is a cyclic number.

It is not a de Polignac number, because 2836781 - 2² = 2836777 is a prime.

It is a super-2 number, since 2×2836781² = 16094652883922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2836789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1418390 + 1418391.

It is an arithmetic number, because the mean of its divisors is an integer number (1418391).

2^2836781 is an apocalyptic number.

It is an amenable number.

2836781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2836781 is an equidigital number, since it uses as much as digits as its factorization.

2836781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 35.

The square root of 2836781 is about 1684.2746213133. The cubic root of 2836781 is about 141.5604506409.

The spelling of 2836781 in words is "two million, eight hundred thirty-six thousand, seven hundred eighty-one".