2173801684273 has 2 divisors, whose sum is σ = 2173801684274. Its totient is φ = 2173801684272.

The previous prime is 2173801684213. The next prime is 2173801684291. The reversal of 2173801684273 is 3724861083712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2105145631744 + 68656052529 = 1450912^2 + 262023^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2173801684273 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2173801684273.

It is not a weakly prime, because it can be changed into another prime (2173801684213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086900842136 + 1086900842137.

It is an arithmetic number, because the mean of its divisors is an integer number (1086900842137).

Almost surely, 2^{2173801684273} is an apocalyptic number.

It is an amenable number.

2173801684273 is a deficient number, since it is larger than the sum of its proper divisors (1).

2173801684273 is an equidigital number, since it uses as much as digits as its factorization.

2173801684273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2709504, while the sum is 52.

The spelling of 2173801684273 in words is "two trillion, one hundred seventy-three billion, eight hundred one million, six hundred eighty-four thousand, two hundred seventy-three".