71709000647 has 2 divisors, whose sum is σ = 71709000648. Its totient is φ = 71709000646.

The previous prime is 71709000641. The next prime is 71709000661. The reversal of 71709000647 is 74600090717.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71709000647 - 2²⁴ = 71692223431 is a prime.

It is a super-3 number, since 3×71709000647³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71709000641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35854500323 + 35854500324.

It is an arithmetic number, because the mean of its divisors is an integer number (35854500324).

Almost surely, 2^71709000647 is an apocalyptic number.

71709000647 is a deficient number, since it is larger than the sum of its proper divisors (1).

71709000647 is an equidigital number, since it uses as much as digits as its factorization.

71709000647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 74088, while the sum is 41.

The spelling of 71709000647 in words is "seventy-one billion, seven hundred nine million, six hundred forty-seven", and thus it is an aban number.