173081998913 has 2 divisors, whose sum is σ = 173081998914. Its totient is φ = 173081998912.

The previous prime is 173081998907. The next prime is 173081998927. The reversal of 173081998913 is 319899180371.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105035624464 + 68046374449 = 324092^2 + 260857^2 .

It is a cyclic number.

It is not a de Polignac number, because 173081998913 - 2⁶ = 173081998849 is a prime.

It is not a weakly prime, because it can be changed into another prime (173081998963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86540999456 + 86540999457.

It is an arithmetic number, because the mean of its divisors is an integer number (86540999457).

Almost surely, 2^173081998913 is an apocalyptic number.

It is an amenable number.

173081998913 is a deficient number, since it is larger than the sum of its proper divisors (1).

173081998913 is an equidigital number, since it uses as much as digits as its factorization.

173081998913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2939328, while the sum is 59.

The spelling of 173081998913 in words is "one hundred seventy-three billion, eighty-one million, nine hundred ninety-eight thousand, nine hundred thirteen".