2678998769 has 2 divisors, whose sum is σ = 2678998770. Its totient is φ = 2678998768.

The previous prime is 2678998757. The next prime is 2678998799. The reversal of 2678998769 is 9678998762.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1673791744 + 1005207025 = 40912^2 + 31705^2 .

It is a cyclic number.

It is not a de Polignac number, because 2678998769 - 2²⁸ = 2410563313 is a prime.

It is a super-2 number, since 2×2678998769² = 14354068808607030722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2678998709) 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, 1339499384 + 1339499385.

It is an arithmetic number, because the mean of its divisors is an integer number (1339499385).

Almost surely, 2^2678998769 is an apocalyptic number.

It is an amenable number.

2678998769 is a deficient number, since it is larger than the sum of its proper divisors (1).

2678998769 is an equidigital number, since it uses as much as digits as its factorization.

2678998769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 164602368, while the sum is 71.

The square root of 2678998769 is about 51759.0452867902. The cubic root of 2678998769 is about 1388.8569124729.

The spelling of 2678998769 in words is "two billion, six hundred seventy-eight million, nine hundred ninety-eight thousand, seven hundred sixty-nine".