2781959 has 2 divisors, whose sum is σ = 2781960. Its totient is φ = 2781958.

The previous prime is 2781949. The next prime is 2781983. The reversal of 2781959 is 9591872.

2781959 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 is a cyclic number.

It is not a de Polignac number, because 2781959 - 2⁸ = 2781703 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 (2781929) 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, 1390979 + 1390980.

It is an arithmetic number, because the mean of its divisors is an integer number (1390980).

2^2781959 is an apocalyptic number.

2781959 is a deficient number, since it is larger than the sum of its proper divisors (1).

2781959 is an equidigital number, since it uses as much as digits as its factorization.

2781959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 41.

The square root of 2781959 is about 1667.9205616575. The cubic root of 2781959 is about 140.6426071123.

The spelling of 2781959 in words is "two million, seven hundred eighty-one thousand, nine hundred fifty-nine".