9959839659 has 96 divisors (see below), whose sum is σ = 18348954624. Its totient is φ = 5055747840.

The previous prime is 9959839649. The next prime is 9959839723. The reversal of 9959839659 is 9569389599.

It is not a de Polignac number, because 9959839659 - 2⁵ = 9959839627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9959839639) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 13699554 + ... + 13700280.

It is an arithmetic number, because the mean of its divisors is an integer number (191134944).

Almost surely, 2^9959839659 is an apocalyptic number.

9959839659 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

9959839659 is a deficient number, since it is larger than the sum of its proper divisors (8389114965).

9959839659 is a wasteful number, since it uses less digits than its factorization.

9959839659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177 (or 1174 counting only the distinct ones).

The product of its digits is 212576400, while the sum is 72.

The square root of 9959839659 is about 99798.9962825278. The cubic root of 9959839659 is about 2151.5467261270.

The spelling of 9959839659 in words is "nine billion, nine hundred fifty-nine million, eight hundred thirty-nine thousand, six hundred fifty-nine".