813984997417 has 2 divisors, whose sum is σ = 813984997418. Its totient is φ = 813984997416.

The previous prime is 813984997339. The next prime is 813984997517. The reversal of 813984997417 is 714799489318.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 439543806361 + 374441191056 = 662981^2 + 611916^2 .

It is a cyclic number.

It is not a de Polignac number, because 813984997417 - 2³¹ = 811837513769 is a prime.

It is not a weakly prime, because it can be changed into another prime (813984997117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406992498708 + 406992498709.

It is an arithmetic number, because the mean of its divisors is an integer number (406992498709).

Almost surely, 2^813984997417 is an apocalyptic number.

It is an amenable number.

813984997417 is a deficient number, since it is larger than the sum of its proper divisors (1).

813984997417 is an equidigital number, since it uses as much as digits as its factorization.

813984997417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 109734912, while the sum is 70.

The spelling of 813984997417 in words is "eight hundred thirteen billion, nine hundred eighty-four million, nine hundred ninety-seven thousand, four hundred seventeen".