9912702505 has 4 divisors (see below), whose sum is σ = 11895243012. Its totient is φ = 7930162000.

The previous prime is 9912702497. The next prime is 9912702509. The reversal of 9912702505 is 5052072199.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5397400089 + 4515302416 = 73467^2 + 67196^2 .

It is not a de Polignac number, because 9912702505 - 2³ = 9912702497 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9912702509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 991270246 + ... + 991270255.

It is an arithmetic number, because the mean of its divisors is an integer number (2973810753).

Almost surely, 2^9912702505 is an apocalyptic number.

It is an amenable number.

9912702505 is a deficient number, since it is larger than the sum of its proper divisors (1982540507).

9912702505 is a wasteful number, since it uses less digits than its factorization.

9912702505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1982540506.

The product of its (nonzero) digits is 56700, while the sum is 40.

The square root of 9912702505 is about 99562.5557375864. Note that the first 3 decimals coincide. The cubic root of 9912702505 is about 2148.1471330639.

The spelling of 9912702505 in words is "nine billion, nine hundred twelve million, seven hundred two thousand, five hundred five".