999065173 has 2 divisors, whose sum is σ = 999065174. Its totient is φ = 999065172.

The previous prime is 999065153. The next prime is 999065183. The reversal of 999065173 is 371560999.

999065173 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 709316689 + 289748484 = 26633^2 + 17022^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999065173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999065143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499532586 + 499532587.

It is an arithmetic number, because the mean of its divisors is an integer number (499532587).

Almost surely, 2^999065173 is an apocalyptic number.

It is an amenable number.

999065173 is a deficient number, since it is larger than the sum of its proper divisors (1).

999065173 is an equidigital number, since it uses as much as digits as its factorization.

999065173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 459270, while the sum is 49.

The square root of 999065173 is about 31607.9922329780. The cubic root of 999065173 is about 999.6882938494.

The spelling of 999065173 in words is "nine hundred ninety-nine million, sixty-five thousand, one hundred seventy-three".