9889768705 has 4 divisors (see below), whose sum is σ = 11867722452. Its totient is φ = 7911814960.

The previous prime is 9889768687. The next prime is 9889768723. The reversal of 9889768705 is 5078679889.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (9889768687) and next prime (9889768723).

It can be written as a sum of positive squares in 2 ways, for example, as 3945975489 + 5943793216 = 62817^2 + 77096^2 .

It is not a de Polignac number, because 9889768705 - 2¹³ = 9889760513 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 988976866 + ... + 988976875.

It is an arithmetic number, because the mean of its divisors is an integer number (2966930613).

Almost surely, 2^9889768705 is an apocalyptic number.

It is an amenable number.

9889768705 is a deficient number, since it is larger than the sum of its proper divisors (1977953747).

9889768705 is a wasteful number, since it uses less digits than its factorization.

9889768705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1977953746.

The product of its (nonzero) digits is 60963840, while the sum is 67.

The square root of 9889768705 is about 99447.3162282422. The cubic root of 9889768705 is about 2146.4892192733.

The spelling of 9889768705 in words is "nine billion, eight hundred eighty-nine million, seven hundred sixty-eight thousand, seven hundred five".