9869449689 has 24 divisors (see below), whose sum is σ = 15555072000. Its totient is φ = 5980249440.

The previous prime is 9869449663. The next prime is 9869449717.

It is a happy number.

9869449689 is nontrivially palindromic in base 10.

9869449689 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 9869449689 - 2²⁵ = 9835895257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9869449609) 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 23 ways as a sum of consecutive naturals, for example, 764712 + ... + 777510.

It is an arithmetic number, because the mean of its divisors is an integer number (648128000).

Almost surely, 2^9869449689 is an apocalyptic number.

9869449689 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

It is an amenable number.

9869449689 is a deficient number, since it is larger than the sum of its proper divisors (5685622311).

9869449689 is a wasteful number, since it uses less digits than its factorization.

9869449689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20605 (or 20602 counting only the distinct ones).

The product of its digits is 241864704, while the sum is 72.

The square root of 9869449689 is about 99345.1040011535. The cubic root of 9869449689 is about 2145.0181888363.

The spelling of 9869449689 in words is "nine billion, eight hundred sixty-nine million, four hundred forty-nine thousand, six hundred eighty-nine".