9878397273 has 6 divisors (see below), whose sum is σ = 14268796074. Its totient is φ = 6585598176.

The previous prime is 9878397271. The next prime is 9878397289. The reversal of 9878397273 is 3727938789.

It can be written as a sum of positive squares in only one way, i.e., 9229829184 + 648568089 = 96072^2 + 25467^2 .

It is not a de Polignac number, because 9878397273 - 2¹ = 9878397271 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9878397273.

It is not an unprimeable number, because it can be changed into a prime (9878397271) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 548799840 + ... + 548799857.

It is an arithmetic number, because the mean of its divisors is an integer number (2378132679).

Almost surely, 2^9878397273 is an apocalyptic number.

It is an amenable number.

9878397273 is a deficient number, since it is larger than the sum of its proper divisors (4390398801).

9878397273 is a wasteful number, since it uses less digits than its factorization.

9878397273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097599703 (or 1097599700 counting only the distinct ones).

The product of its digits is 32006016, while the sum is 63.

The square root of 9878397273 is about 99390.1266374080. The cubic root of 9878397273 is about 2145.6662132600. Note that the first 3 decimals are identical.

The spelling of 9878397273 in words is "nine billion, eight hundred seventy-eight million, three hundred ninety-seven thousand, two hundred seventy-three".