2731247747 has 2 divisors, whose sum is σ = 2731247748. Its totient is φ = 2731247746.

The previous prime is 2731247699. The next prime is 2731247749. The reversal of 2731247747 is 7477421372.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2731247747 - 2¹² = 2731243651 is a prime.

Together with 2731247749, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2731247698 and 2731247707.

It is not a weakly prime, because it can be changed into another prime (2731247749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1365623873 + 1365623874.

It is an arithmetic number, because the mean of its divisors is an integer number (1365623874).

Almost surely, 2^2731247747 is an apocalyptic number.

2731247747 is a deficient number, since it is larger than the sum of its proper divisors (1).

2731247747 is an equidigital number, since it uses as much as digits as its factorization.

2731247747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 460992, while the sum is 44.

The square root of 2731247747 is about 52261.3408457915. The cubic root of 2731247747 is about 1397.8278811611.

The spelling of 2731247747 in words is "two billion, seven hundred thirty-one million, two hundred forty-seven thousand, seven hundred forty-seven".