173189977913 has 2 divisors, whose sum is σ = 173189977914. Its totient is φ = 173189977912.

The previous prime is 173189977871. The next prime is 173189977963. The reversal of 173189977913 is 319779981371.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 171369505024 + 1820472889 = 413968^2 + 42667^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-173189977913 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 173189977913.

It is not a weakly prime, because it can be changed into another prime (173189977963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86594988956 + 86594988957.

It is an arithmetic number, because the mean of its divisors is an integer number (86594988957).

Almost surely, 2^173189977913 is an apocalyptic number.

It is an amenable number.

173189977913 is a deficient number, since it is larger than the sum of its proper divisors (1).

173189977913 is an equidigital number, since it uses as much as digits as its factorization.

173189977913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18003384, while the sum is 65.

The spelling of 173189977913 in words is "one hundred seventy-three billion, one hundred eighty-nine million, nine hundred seventy-seven thousand, nine hundred thirteen".