1000002173 has 2 divisors, whose sum is σ = 1000002174. Its totient is φ = 1000002172.

The previous prime is 1000002161. The next prime is 1000002187. The reversal of 1000002173 is 3712000001.

It is an a-pointer prime, because the next prime (1000002187) can be obtained adding 1000002173 to its sum of digits (14).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 719205124 + 280797049 = 26818^2 + 16757^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000002173 - 2⁸ = 1000001917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000002103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500001086 + 500001087.

It is an arithmetic number, because the mean of its divisors is an integer number (500001087).

Almost surely, 2^1000002173 is an apocalyptic number.

It is an amenable number.

1000002173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000002173 is an equidigital number, since it uses as much as digits as its factorization.

1000002173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42, while the sum is 14.

The square root of 1000002173 is about 31622.8109598119. The cubic root of 1000002173 is about 1000.0007243328. Note that the first 3 decimals are identical.

Adding to 1000002173 its reverse (3712000001), we get a palindrome (4712002174).

The spelling of 1000002173 in words is "one billion, two thousand, one hundred seventy-three".