8173922913 has 24 divisors (see below), whose sum is σ = 12827533992. Its totient is φ = 4985584128.

The previous prime is 8173922899. The next prime is 8173922947. The reversal of 8173922913 is 3192293718.

It can be written as a sum of positive squares in 4 ways, for example, as 842624784 + 7331298129 = 29028^2 + 85623^2 .

It is not a de Polignac number, because 8173922913 - 2⁶ = 8173922849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8173922963) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 295906 + ... + 322347.

It is an arithmetic number, because the mean of its divisors is an integer number (534480583).

Almost surely, 2^8173922913 is an apocalyptic number.

It is an amenable number.

8173922913 is a deficient number, since it is larger than the sum of its proper divisors (4653611079).

8173922913 is a wasteful number, since it uses less digits than its factorization.

8173922913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618385 (or 618382 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 8173922913 is about 90409.7500992011. The cubic root of 8173922913 is about 2014.3897946845.

The spelling of 8173922913 in words is "eight billion, one hundred seventy-three million, nine hundred twenty-two thousand, nine hundred thirteen".