8913138173 has 2 divisors, whose sum is σ = 8913138174. Its totient is φ = 8913138172.

The previous prime is 8913138167. The next prime is 8913138187. The reversal of 8913138173 is 3718313198.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8201475844 + 711662329 = 90562^2 + 26677^2 .

It is a cyclic number.

It is not a de Polignac number, because 8913138173 - 2⁶ = 8913138109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8913138163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4456569086 + 4456569087.

It is an arithmetic number, because the mean of its divisors is an integer number (4456569087).

Almost surely, 2^8913138173 is an apocalyptic number.

It is an amenable number.

8913138173 is a deficient number, since it is larger than the sum of its proper divisors (1).

8913138173 is an equidigital number, since it uses as much as digits as its factorization.

8913138173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 44.

The square root of 8913138173 is about 94409.4178194104. The cubic root of 8913138173 is about 2073.3703310470.

The spelling of 8913138173 in words is "eight billion, nine hundred thirteen million, one hundred thirty-eight thousand, one hundred seventy-three".