9712782671 has 2 divisors, whose sum is σ = 9712782672. Its totient is φ = 9712782670.

The previous prime is 9712782659. The next prime is 9712782713. The reversal of 9712782671 is 1762872179.

It is a happy number.

9712782671 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9712782671 - 2²² = 9708588367 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9712782571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4856391335 + 4856391336.

It is an arithmetic number, because the mean of its divisors is an integer number (4856391336).

Almost surely, 2^9712782671 is an apocalyptic number.

9712782671 is a deficient number, since it is larger than the sum of its proper divisors (1).

9712782671 is an equidigital number, since it uses as much as digits as its factorization.

9712782671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 592704, while the sum is 50.

The square root of 9712782671 is about 98553.4508325305. The cubic root of 9712782671 is about 2133.6076364871.

The spelling of 9712782671 in words is "nine billion, seven hundred twelve million, seven hundred eighty-two thousand, six hundred seventy-one".