2678792981 has 2 divisors, whose sum is σ = 2678792982. Its totient is φ = 2678792980.

The previous prime is 2678792947. The next prime is 2678793077. The reversal of 2678792981 is 1892978762.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2449755025 + 229037956 = 49495^2 + 15134^2 .

It is a cyclic number.

It is not a de Polignac number, because 2678792981 - 2⁶ = 2678792917 is a prime.

It is a super-2 number, since 2×2678792981² = 14351863670109732722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2678792981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2678732981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1339396490 + 1339396491.

It is an arithmetic number, because the mean of its divisors is an integer number (1339396491).

Almost surely, 2^2678792981 is an apocalyptic number.

It is an amenable number.

2678792981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2678792981 is an equidigital number, since it uses as much as digits as its factorization.

2678792981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6096384, while the sum is 59.

The square root of 2678792981 is about 51757.0573062264. The cubic root of 2678792981 is about 1388.8213497585.

The spelling of 2678792981 in words is "two billion, six hundred seventy-eight million, seven hundred ninety-two thousand, nine hundred eighty-one".