9998368769 has 2 divisors, whose sum is σ = 9998368770. Its totient is φ = 9998368768.

The previous prime is 9998368739. The next prime is 9998368843. The reversal of 9998368769 is 9678638999.

It is an a-pointer prime, because the next prime (9998368843) can be obtained adding 9998368769 to its sum of digits (74).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5703270400 + 4295098369 = 75520^2 + 65537^2 .

It is a cyclic number.

It is not a de Polignac number, because 9998368769 - 2²⁸ = 9729933313 is a prime.

It is a super-2 number, since 2×9998368769² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 9998368696 and 9998368705.

It is not a weakly prime, because it can be changed into another prime (9998368739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999184384 + 4999184385.

It is an arithmetic number, because the mean of its divisors is an integer number (4999184385).

Almost surely, 2^9998368769 is an apocalyptic number.

It is an amenable number.

9998368769 is a deficient number, since it is larger than the sum of its proper divisors (1).

9998368769 is an equidigital number, since it uses as much as digits as its factorization.

9998368769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317447424, while the sum is 74.

The square root of 9998368769 is about 99991.8435123585. The cubic root of 9998368769 is about 2154.3175376398.

The spelling of 9998368769 in words is "nine billion, nine hundred ninety-eight million, three hundred sixty-eight thousand, seven hundred sixty-nine".