173187472873 has 2 divisors, whose sum is σ = 173187472874. Its totient is φ = 173187472872.

The previous prime is 173187472849. The next prime is 173187472889. The reversal of 173187472873 is 378274781371.

173187472873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161015205289 + 12172267584 = 401267^2 + 110328^2 .

It is an emirp because it is prime and its reverse (378274781371) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 173187472873 - 2⁵ = 173187472841 is a prime.

It is a super-2 number, since 2×173187472873² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (173187472373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86593736436 + 86593736437.

It is an arithmetic number, because the mean of its divisors is an integer number (86593736437).

Almost surely, 2^173187472873 is an apocalyptic number.

It is an amenable number.

173187472873 is a deficient number, since it is larger than the sum of its proper divisors (1).

173187472873 is an equidigital number, since it uses as much as digits as its factorization.

173187472873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11063808, while the sum is 58.

The spelling of 173187472873 in words is "one hundred seventy-three billion, one hundred eighty-seven million, four hundred seventy-two thousand, eight hundred seventy-three".