917463807647 has 2 divisors, whose sum is σ = 917463807648. Its totient is φ = 917463807646.

The previous prime is 917463807581. The next prime is 917463807649. The reversal of 917463807647 is 746708364719.

It is a strong prime.

It is an emirp because it is prime and its reverse (746708364719) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 917463807647 - 2⁸ = 917463807391 is a prime.

Together with 917463807649, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 917463807647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (917463807649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 458731903823 + 458731903824.

It is an arithmetic number, because the mean of its divisors is an integer number (458731903824).

Almost surely, 2^917463807647 is an apocalyptic number.

917463807647 is a deficient number, since it is larger than the sum of its proper divisors (1).

917463807647 is an equidigital number, since it uses as much as digits as its factorization.

917463807647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42674688, while the sum is 62.

The spelling of 917463807647 in words is "nine hundred seventeen billion, four hundred sixty-three million, eight hundred seven thousand, six hundred forty-seven".