2781343679 has 2 divisors, whose sum is σ = 2781343680. Its totient is φ = 2781343678.

The previous prime is 2781343637. The next prime is 2781343703. The reversal of 2781343679 is 9763431872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2781343679 - 2²⁰ = 2780295103 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 (2781343079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1390671839 + 1390671840.

It is an arithmetic number, because the mean of its divisors is an integer number (1390671840).

Almost surely, 2^2781343679 is an apocalyptic number.

2781343679 is a deficient number, since it is larger than the sum of its proper divisors (1).

2781343679 is an equidigital number, since it uses as much as digits as its factorization.

2781343679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 50.

The square root of 2781343679 is about 52738.4459289426. The cubic root of 2781343679 is about 1406.3223711390.

The spelling of 2781343679 in words is "two billion, seven hundred eighty-one million, three hundred forty-three thousand, six hundred seventy-nine".