243073 has 2 divisors, whose sum is σ = 243074. Its totient is φ = 243072.

The previous prime is 243031. The next prime is 243077. The reversal of 243073 is 370342.

243073 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., 199809 + 43264 = 447^2 + 208^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243073.

It is not a weakly prime, because it can be changed into another prime (243077) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121536 + 121537.

It is an arithmetic number, because the mean of its divisors is an integer number (121537).

2²⁴³⁰⁷³ is an apocalyptic number.

It is an amenable number.

243073 is a deficient number, since it is larger than the sum of its proper divisors (1).

243073 is an equidigital number, since it uses as much as digits as its factorization.

243073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 19.

The square root of 243073 is about 493.0243401699. The cubic root of 243073 is about 62.4087628774.

It can be divided in two parts, 24307 and 3, that added together give a triangular number (24310 = T₂₂₀).

The spelling of 243073 in words is "two hundred forty-three thousand, seventy-three", and thus it is an iban number.