2781606797 has 2 divisors, whose sum is σ = 2781606798. Its totient is φ = 2781606796.

The previous prime is 2781606769. The next prime is 2781606803. The reversal of 2781606797 is 7976061872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2667309316 + 114297481 = 51646^2 + 10691^2 .

It is a cyclic number.

It is not a de Polignac number, because 2781606797 - 2²⁸ = 2513171341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2781606727) 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, 1390803398 + 1390803399.

It is an arithmetic number, because the mean of its divisors is an integer number (1390803399).

Almost surely, 2^2781606797 is an apocalyptic number.

It is an amenable number.

2781606797 is a deficient number, since it is larger than the sum of its proper divisors (1).

2781606797 is an equidigital number, since it uses as much as digits as its factorization.

2781606797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1778112, while the sum is 53.

The square root of 2781606797 is about 52740.9404258210. The cubic root of 2781606797 is about 1406.3667162595.

The spelling of 2781606797 in words is "two billion, seven hundred eighty-one million, six hundred six thousand, seven hundred ninety-seven".