2781754321 has 2 divisors, whose sum is σ = 2781754322. Its totient is φ = 2781754320.

The previous prime is 2781754291. The next prime is 2781754331. The reversal of 2781754321 is 1234571872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2770864321 + 10890000 = 52639^2 + 3300^2 .

It is a cyclic number.

It is not a de Polignac number, because 2781754321 - 2⁵ = 2781754289 is a prime.

It is not a weakly prime, because it can be changed into another prime (2781754331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1390877160 + 1390877161.

It is an arithmetic number, because the mean of its divisors is an integer number (1390877161).

Almost surely, 2^2781754321 is an apocalyptic number.

It is an amenable number.

2781754321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2781754321 is an equidigital number, since it uses as much as digits as its factorization.

2781754321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94080, while the sum is 40.

The square root of 2781754321 is about 52742.3389792300. The cubic root of 2781754321 is about 1406.3915782896.

The spelling of 2781754321 in words is "two billion, seven hundred eighty-one million, seven hundred fifty-four thousand, three hundred twenty-one".