173729243 has 2 divisors, whose sum is σ = 173729244. Its totient is φ = 173729242.

The previous prime is 173729203. The next prime is 173729287. The reversal of 173729243 is 342927371.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-173729243 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 173729197 and 173729206.

It is not a weakly prime, because it can be changed into another prime (173729203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86864621 + 86864622.

It is an arithmetic number, because the mean of its divisors is an integer number (86864622).

Almost surely, 2^173729243 is an apocalyptic number.

173729243 is a deficient number, since it is larger than the sum of its proper divisors (1).

173729243 is an equidigital number, since it uses as much as digits as its factorization.

173729243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 38.

The square root of 173729243 is about 13180.6389450588. The cubic root of 173729243 is about 557.9872932535.

The spelling of 173729243 in words is "one hundred seventy-three million, seven hundred twenty-nine thousand, two hundred forty-three".