243902773 has 2 divisors, whose sum is σ = 243902774. Its totient is φ = 243902772.

The previous prime is 243902669. The next prime is 243902803. The reversal of 243902773 is 377209342.

243902773 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., 137874564 + 106028209 = 11742^2 + 10297^2 .

It is a cyclic number.

It is not a de Polignac number, because 243902773 - 2¹⁷ = 243771701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243902273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121951386 + 121951387.

It is an arithmetic number, because the mean of its divisors is an integer number (121951387).

Almost surely, 2^243902773 is an apocalyptic number.

It is an amenable number.

243902773 is a deficient number, since it is larger than the sum of its proper divisors (1).

243902773 is an equidigital number, since it uses as much as digits as its factorization.

243902773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 37.

The square root of 243902773 is about 15617.3868812936. The cubic root of 243902773 is about 624.7969670113.

The spelling of 243902773 in words is "two hundred forty-three million, nine hundred two thousand, seven hundred seventy-three".