9943249689 has 48 divisors (see below), whose sum is σ = 15700018880. Its totient is φ = 6271266240.

The previous prime is 9943249681. The next prime is 9943249711. The reversal of 9943249689 is 9869423499.

It is a happy number.

It is not a de Polignac number, because 9943249689 - 2³ = 9943249681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9943249681) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5710359 + ... + 5712099.

Almost surely, 2^9943249689 is an apocalyptic number.

It is an amenable number.

9943249689 is a deficient number, since it is larger than the sum of its proper divisors (5756769191).

9943249689 is a wasteful number, since it uses less digits than its factorization.

9943249689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3012 (or 3000 counting only the distinct ones).

The product of its digits is 30233088, while the sum is 63.

The square root of 9943249689 is about 99715.8447238953. The cubic root of 9943249689 is about 2150.3514614905.

The spelling of 9943249689 in words is "nine billion, nine hundred forty-three million, two hundred forty-nine thousand, six hundred eighty-nine".