3999112002173 has 2 divisors, whose sum is σ = 3999112002174. Its totient is φ = 3999112002172.

The previous prime is 3999112002139. The next prime is 3999112002251. The reversal of 3999112002173 is 3712002119993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2908344819769 + 1090767182404 = 1705387^2 + 1044398^2 .

It is a cyclic number.

It is not a de Polignac number, because 3999112002173 - 2⁸ = 3999112001917 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3999112002113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1999556001086 + 1999556001087.

It is an arithmetic number, because the mean of its divisors is an integer number (1999556001087).

Almost surely, 2^{3999112002173} is an apocalyptic number.

It is an amenable number.

3999112002173 is a deficient number, since it is larger than the sum of its proper divisors (1).

3999112002173 is an equidigital number, since it uses as much as digits as its factorization.

3999112002173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 183708, while the sum is 47.

The spelling of 3999112002173 in words is "three trillion, nine hundred ninety-nine billion, one hundred twelve million, two thousand, one hundred seventy-three".