2000991173 has 2 divisors, whose sum is σ = 2000991174. Its totient is φ = 2000991172.

The previous prime is 2000991149. The next prime is 2000991199. The reversal of 2000991173 is 3711990002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1454507044 + 546484129 = 38138^2 + 23377^2 .

It is a cyclic number.

It is not a de Polignac number, because 2000991173 - 2⁸ = 2000990917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2000991143) 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, 1000495586 + 1000495587.

It is an arithmetic number, because the mean of its divisors is an integer number (1000495587).

Almost surely, 2^2000991173 is an apocalyptic number.

It is an amenable number.

2000991173 is a deficient number, since it is larger than the sum of its proper divisors (1).

2000991173 is an equidigital number, since it uses as much as digits as its factorization.

2000991173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 2000991173 is about 44732.4398283841. The cubic root of 2000991173 is about 1260.1291488095.

The spelling of 2000991173 in words is "two billion, nine hundred ninety-one thousand, one hundred seventy-three".