9638994281 has 12 divisors (see below), whose sum is σ = 11214732672. Its totient is φ = 8260503048.

The previous prime is 9638994259. The next prime is 9638994347. The reversal of 9638994281 is 1824998369.

9638994281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9638994281 - 2¹⁴ = 9638977897 is a prime.

It is a super-2 number, since 2×9638994281² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9638994281.

It is not an unprimeable number, because it can be changed into a prime (9638994881) 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 11 ways as a sum of consecutive naturals, for example, 321956 + ... + 350618.

It is an arithmetic number, because the mean of its divisors is an integer number (934561056).

Almost surely, 2^9638994281 is an apocalyptic number.

It is an amenable number.

9638994281 is a deficient number, since it is larger than the sum of its proper divisors (1575738391).

9638994281 is a wasteful number, since it uses less digits than its factorization.

9638994281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35540 (or 35533 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 59.

The square root of 9638994281 is about 98178.3799061688. The cubic root of 9638994281 is about 2128.1908625265.

The spelling of 9638994281 in words is "nine billion, six hundred thirty-eight million, nine hundred ninety-four thousand, two hundred eighty-one".