2768681 has 2 divisors, whose sum is σ = 2768682. Its totient is φ = 2768680.

The previous prime is 2768677. The next prime is 2768683. The reversal of 2768681 is 1868672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2128681 + 640000 = 1459^2 + 800^2 .

It is a cyclic number.

It is not a de Polignac number, because 2768681 - 2² = 2768677 is a prime.

It is a super-2 number, since 2×2768681² = 15331188959522, which contains 22 as substring.

Together with 2768683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2768683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1384340 + 1384341.

It is an arithmetic number, because the mean of its divisors is an integer number (1384341).

2^2768681 is an apocalyptic number.

It is an amenable number.

2768681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2768681 is an equidigital number, since it uses as much as digits as its factorization.

2768681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 38.

The square root of 2768681 is about 1663.9353953805. The cubic root of 2768681 is about 140.4184926792.

Subtracting from 2768681 its reverse (1868672), we obtain a palindrome (900009).

The spelling of 2768681 in words is "two million, seven hundred sixty-eight thousand, six hundred eighty-one".