173021243 has 2 divisors, whose sum is σ = 173021244. Its totient is φ = 173021242.

The previous prime is 173021237. The next prime is 173021281. The reversal of 173021243 is 342120371.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 173021243 - 2⁴ = 173021227 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (173021843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86510621 + 86510622.

It is an arithmetic number, because the mean of its divisors is an integer number (86510622).

Almost surely, 2^173021243 is an apocalyptic number.

173021243 is a deficient number, since it is larger than the sum of its proper divisors (1).

173021243 is an equidigital number, since it uses as much as digits as its factorization.

173021243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 173021243 is about 13153.7539508689. The cubic root of 173021243 is about 557.2282713948.

The spelling of 173021243 in words is "one hundred seventy-three million, twenty-one thousand, two hundred forty-three".