2781613073 has 2 divisors, whose sum is σ = 2781613074. Its totient is φ = 2781613072.

The previous prime is 2781613067. The next prime is 2781613139. The reversal of 2781613073 is 3703161872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2038341904 + 743271169 = 45148^2 + 27263^2 .

It is a cyclic number.

It is not a de Polignac number, because 2781613073 - 2⁴ = 2781613057 is a prime.

It is not a weakly prime, because it can be changed into another prime (2781613013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1390806536 + 1390806537.

It is an arithmetic number, because the mean of its divisors is an integer number (1390806537).

Almost surely, 2^2781613073 is an apocalyptic number.

It is an amenable number.

2781613073 is a deficient number, since it is larger than the sum of its proper divisors (1).

2781613073 is an equidigital number, since it uses as much as digits as its factorization.

2781613073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 2781613073 is about 52740.9999241577. Note that the first 4 decimals coincide. The cubic root of 2781613073 is about 1406.3677739636.

The spelling of 2781613073 in words is "two billion, seven hundred eighty-one million, six hundred thirteen thousand, seventy-three".