9171725922 has 18 divisors (see below), whose sum is σ = 19872953217. Its totient is φ = 3057106536.

The previous prime is 9171725873. The next prime is 9171725929. The reversal of 9171725922 is 2295271719.

It can be written as a sum of positive squares in 2 ways, for example, as 6669825561 + 2501900361 = 81669^2 + 50019^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=67719.

It is not an unprimeable number, because it can be changed into a prime (9171725929) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 395028 + ... + 417600.

Almost surely, 2^9171725922 is an apocalyptic number.

9171725922 is an abundant number, since it is smaller than the sum of its proper divisors (10701227295).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9171725922 is an frugal number, since it uses more digits than its factorization.

9171725922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45154 (or 22578 counting only the distinct ones).

The product of its digits is 158760, while the sum is 45.

The square root of 9171725922 is about 95769.1282303436. The cubic root of 9171725922 is about 2093.2303488076.

The spelling of 9171725922 in words is "nine billion, one hundred seventy-one million, seven hundred twenty-five thousand, nine hundred twenty-two".