71447232709 has 2 divisors, whose sum is σ = 71447232710. Its totient is φ = 71447232708.

The previous prime is 71447232707. The next prime is 71447232757. The reversal of 71447232709 is 90723274417.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63263316484 + 8183916225 = 251522^2 + 90465^2 .

It is a cyclic number.

It is not a de Polignac number, because 71447232709 - 2¹ = 71447232707 is a prime.

Together with 71447232707, 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 (71447232707) 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, 35723616354 + 35723616355.

It is an arithmetic number, because the mean of its divisors is an integer number (35723616355).

Almost surely, 2^71447232709 is an apocalyptic number.

It is an amenable number.

71447232709 is a deficient number, since it is larger than the sum of its proper divisors (1).

71447232709 is an equidigital number, since it uses as much as digits as its factorization.

71447232709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 592704, while the sum is 46.

The spelling of 71447232709 in words is "seventy-one billion, four hundred forty-seven million, two hundred thirty-two thousand, seven hundred nine".