172873144289 has 2 divisors, whose sum is σ = 172873144290. Its totient is φ = 172873144288.

The previous prime is 172873144277. The next prime is 172873144307. The reversal of 172873144289 is 982441378271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151969767889 + 20903376400 = 389833^2 + 144580^2 .

It is a cyclic number.

It is not a de Polignac number, because 172873144289 - 2¹⁶ = 172873078753 is a prime.

It is not a weakly prime, because it can be changed into another prime (172873144259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86436572144 + 86436572145.

It is an arithmetic number, because the mean of its divisors is an integer number (86436572145).

Almost surely, 2^172873144289 is an apocalyptic number.

It is an amenable number.

172873144289 is a deficient number, since it is larger than the sum of its proper divisors (1).

172873144289 is an equidigital number, since it uses as much as digits as its factorization.

172873144289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5419008, while the sum is 56.

The spelling of 172873144289 in words is "one hundred seventy-two billion, eight hundred seventy-three million, one hundred forty-four thousand, two hundred eighty-nine".