2740394221 has 2 divisors, whose sum is σ = 2740394222. Its totient is φ = 2740394220.

The previous prime is 2740394201. The next prime is 2740394287. The reversal of 2740394221 is 1224930472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2723378596 + 17015625 = 52186^2 + 4125^2 .

It is a cyclic number.

It is not a de Polignac number, because 2740394221 - 2¹³ = 2740386029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2740394201) 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, 1370197110 + 1370197111.

It is an arithmetic number, because the mean of its divisors is an integer number (1370197111).

Almost surely, 2^2740394221 is an apocalyptic number.

It is an amenable number.

2740394221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2740394221 is an equidigital number, since it uses as much as digits as its factorization.

2740394221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 2740394221 is about 52348.7747803136. The cubic root of 2740394221 is about 1399.3865034768.

The spelling of 2740394221 in words is "two billion, seven hundred forty million, three hundred ninety-four thousand, two hundred twenty-one".