2781322373 has 2 divisors, whose sum is σ = 2781322374. Its totient is φ = 2781322372.

The previous prime is 2781322319. The next prime is 2781322409. The reversal of 2781322373 is 3732231872.

2781322373 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2660805889 + 120516484 = 51583^2 + 10978^2 .

It is a cyclic number.

It is not a de Polignac number, because 2781322373 - 2¹⁶ = 2781256837 is a prime.

It is a super-2 number, since 2×2781322373² = 15471508285100702258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2781322673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1390661186 + 1390661187.

It is an arithmetic number, because the mean of its divisors is an integer number (1390661187).

Almost surely, 2^2781322373 is an apocalyptic number.

It is an amenable number.

2781322373 is a deficient number, since it is larger than the sum of its proper divisors (1).

2781322373 is an equidigital number, since it uses as much as digits as its factorization.

2781322373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 38.

The square root of 2781322373 is about 52738.2439317048. The cubic root of 2781322373 is about 1406.3187801671.

The spelling of 2781322373 in words is "two billion, seven hundred eighty-one million, three hundred twenty-two thousand, three hundred seventy-three".