2101173689 has 2 divisors, whose sum is σ = 2101173690. Its totient is φ = 2101173688.

The previous prime is 2101173647. The next prime is 2101173709. The reversal of 2101173689 is 9863711012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2071797289 + 29376400 = 45517^2 + 5420^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101173689 - 2²⁰ = 2100125113 is a prime.

It is not a weakly prime, because it can be changed into another prime (2101173889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050586844 + 1050586845.

It is an arithmetic number, because the mean of its divisors is an integer number (1050586845).

Almost surely, 2^2101173689 is an apocalyptic number.

It is an amenable number.

2101173689 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101173689 is an equidigital number, since it uses as much as digits as its factorization.

2101173689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 2101173689 is about 45838.5611576105. The cubic root of 2101173689 is about 1280.8176922506.

The spelling of 2101173689 in words is "two billion, one hundred one million, one hundred seventy-three thousand, six hundred eighty-nine".