9988252709 has 16 divisors (see below), whose sum is σ = 11150625600. Its totient is φ = 8891368704.

The previous prime is 9988252663. The next prime is 9988252717. The reversal of 9988252709 is 9072528899.

It is a cyclic number.

It is not a de Polignac number, because 9988252709 - 2²⁸ = 9719817253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9988252739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174959 + ... + 224915.

It is an arithmetic number, because the mean of its divisors is an integer number (696914100).

Almost surely, 2^9988252709 is an apocalyptic number.

It is an amenable number.

9988252709 is a deficient number, since it is larger than the sum of its proper divisors (1162372891).

9988252709 is a wasteful number, since it uses less digits than its factorization.

9988252709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50612.

The product of its (nonzero) digits is 6531840, while the sum is 59.

The square root of 9988252709 is about 99941.2462850049. The cubic root of 9988252709 is about 2153.5907337641.

The spelling of 9988252709 in words is "nine billion, nine hundred eighty-eight million, two hundred fifty-two thousand, seven hundred nine".