9638998369 has 16 divisors (see below), whose sum is σ = 12941873280. Its totient is φ = 6933144960.

The previous prime is 9638998333. The next prime is 9638998381.

9638998369 is nontrivially palindromic in base 10.

9638998369 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-9638998369 is a prime.

It is a super-2 number, since 2×9638998369² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9638998298 and 9638998307.

It is not an unprimeable number, because it can be changed into a prime (9638998069) 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 in 15 ways as a sum of consecutive naturals, for example, 4813684 + ... + 4815685.

It is an arithmetic number, because the mean of its divisors is an integer number (808867080).

Almost surely, 2^9638998369 is an apocalyptic number.

It is an amenable number.

9638998369 is a deficient number, since it is larger than the sum of its proper divisors (3302874911).

9638998369 is a wasteful number, since it uses less digits than its factorization.

9638998369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9629400.

The product of its digits is 136048896, while the sum is 70.

The square root of 9638998369 is about 98178.4007254141. The cubic root of 9638998369 is about 2128.1911633892.

The spelling of 9638998369 in words is "nine billion, six hundred thirty-eight million, nine hundred ninety-eight thousand, three hundred sixty-nine".