1001000173 has 2 divisors, whose sum is σ = 1001000174. Its totient is φ = 1001000172.

The previous prime is 1001000159. The next prime is 1001000233. The reversal of 1001000173 is 3710001001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 542098089 + 458902084 = 23283^2 + 21422^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001000173 - 2⁵ = 1001000141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001000113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500500086 + 500500087.

It is an arithmetic number, because the mean of its divisors is an integer number (500500087).

Almost surely, 2^1001000173 is an apocalyptic number.

It is an amenable number.

1001000173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001000173 is an equidigital number, since it uses as much as digits as its factorization.

1001000173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21, while the sum is 13.

The square root of 1001000173 is about 31638.5867731161. The cubic root of 1001000173 is about 1000.3332799122. Note that the first 3 decimals are identical.

Adding to 1001000173 its reverse (3710001001), we get a palindrome (4711001174).

The spelling of 1001000173 in words is "one billion, one million, one hundred seventy-three", and thus it is an aban number.