2681647939 has 2 divisors, whose sum is σ = 2681647940. Its totient is φ = 2681647938.

The previous prime is 2681647879. The next prime is 2681647979. The reversal of 2681647939 is 9397461862.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2681647939 - 2¹⁵ = 2681615171 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2681647939.

It is not a weakly prime, because it can be changed into another prime (2681647979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1340823969 + 1340823970.

It is an arithmetic number, because the mean of its divisors is an integer number (1340823970).

Almost surely, 2^2681647939 is an apocalyptic number.

2681647939 is a deficient number, since it is larger than the sum of its proper divisors (1).

2681647939 is an equidigital number, since it uses as much as digits as its factorization.

2681647939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3919104, while the sum is 55.

The square root of 2681647939 is about 51784.6303356508. The cubic root of 2681647939 is about 1389.3145593112.

The spelling of 2681647939 in words is "two billion, six hundred eighty-one million, six hundred forty-seven thousand, nine hundred thirty-nine".