9938394469 has 2 divisors, whose sum is σ = 9938394470. Its totient is φ = 9938394468.

The previous prime is 9938394449. The next prime is 9938394533. The reversal of 9938394469 is 9644938399.

It is an a-pointer prime, because the next prime (9938394533) can be obtained adding 9938394469 to its sum of digits (64).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8960894244 + 977500225 = 94662^2 + 31265^2 .

It is a cyclic number.

It is not a de Polignac number, because 9938394469 - 2¹³ = 9938386277 is a prime.

It is a super-2 number, since 2×9938394469² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9938394469.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9938394449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4969197234 + 4969197235.

It is an arithmetic number, because the mean of its divisors is an integer number (4969197235).

Almost surely, 2^9938394469 is an apocalyptic number.

It is an amenable number.

9938394469 is a deficient number, since it is larger than the sum of its proper divisors (1).

9938394469 is an equidigital number, since it uses as much as digits as its factorization.

9938394469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45349632, while the sum is 64.

The square root of 9938394469 is about 99691.4964728687. The cubic root of 9938394469 is about 2150.0014039291.

The spelling of 9938394469 in words is "nine billion, nine hundred thirty-eight million, three hundred ninety-four thousand, four hundred sixty-nine".