2731345909 has 2 divisors, whose sum is σ = 2731345910. Its totient is φ = 2731345908.

The previous prime is 2731345907. The next prime is 2731345927. The reversal of 2731345909 is 9095431372.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2566942225 + 164403684 = 50665^2 + 12822^2 .

It is a cyclic number.

It is not a de Polignac number, because 2731345909 - 2¹ = 2731345907 is a prime.

It is a super-2 number, since 2×2731345909² = 14920500949222072562, which contains 22 as substring.

Together with 2731345907, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2731345907) 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, 1365672954 + 1365672955.

It is an arithmetic number, because the mean of its divisors is an integer number (1365672955).

Almost surely, 2^2731345909 is an apocalyptic number.

It is an amenable number.

2731345909 is a deficient number, since it is larger than the sum of its proper divisors (1).

2731345909 is an equidigital number, since it uses as much as digits as its factorization.

2731345909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 2731345909 is about 52262.2799827945. The cubic root of 2731345909 is about 1397.8446271016.

The spelling of 2731345909 in words is "two billion, seven hundred thirty-one million, three hundred forty-five thousand, nine hundred nine".