2780749373 has 2 divisors, whose sum is σ = 2780749374. Its totient is φ = 2780749372.

The previous prime is 2780749369. The next prime is 2780749399. The reversal of 2780749373 is 3739470872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1400106724 + 1380642649 = 37418^2 + 37157^2 .

It is a cyclic number.

It is not a de Polignac number, because 2780749373 - 2² = 2780749369 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2780749333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1390374686 + 1390374687.

It is an arithmetic number, because the mean of its divisors is an integer number (1390374687).

Almost surely, 2^2780749373 is an apocalyptic number.

It is an amenable number.

2780749373 is a deficient number, since it is larger than the sum of its proper divisors (1).

2780749373 is an equidigital number, since it uses as much as digits as its factorization.

2780749373 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 50.

The square root of 2780749373 is about 52732.8111615529. The cubic root of 2780749373 is about 1406.2221982902. Note that the first 3 decimals are identical.

The spelling of 2780749373 in words is "two billion, seven hundred eighty million, seven hundred forty-nine thousand, three hundred seventy-three".