9639449369 has 8 divisors (see below), whose sum is σ = 10517414880. Its totient is φ = 8761759200.

The previous prime is 9639449353. The next prime is 9639449377.

It is a happy number.

9639449369 is nontrivially palindromic in base 10.

9639449369 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9639449369 - 2⁴ = 9639449353 is a prime.

It is a super-2 number, since 2×9639449369² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9639449329) 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 7 ways as a sum of consecutive naturals, for example, 8117 + ... + 139085.

It is an arithmetic number, because the mean of its divisors is an integer number (1314676860).

Almost surely, 2^9639449369 is an apocalyptic number.

It is an amenable number.

9639449369 is a deficient number, since it is larger than the sum of its proper divisors (877965511).

9639449369 is a wasteful number, since it uses less digits than its factorization.

9639449369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137671.

The product of its digits is 34012224, while the sum is 62.

The square root of 9639449369 is about 98180.6975377543. The cubic root of 9639449369 is about 2128.2243549170.

The spelling of 9639449369 in words is "nine billion, six hundred thirty-nine million, four hundred forty-nine thousand, three hundred sixty-nine".