243969377 has 2 divisors, whose sum is σ = 243969378. Its totient is φ = 243969376.

The previous prime is 243969371. The next prime is 243969389. The reversal of 243969377 is 773969342.

243969377 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 177449041 + 66520336 = 13321^2 + 8156^2 .

It is a cyclic number.

It is not a de Polignac number, because 243969377 - 2¹⁶ = 243903841 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (243969371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121984688 + 121984689.

It is an arithmetic number, because the mean of its divisors is an integer number (121984689).

Almost surely, 2^243969377 is an apocalyptic number.

It is an amenable number.

243969377 is a deficient number, since it is larger than the sum of its proper divisors (1).

243969377 is an equidigital number, since it uses as much as digits as its factorization.

243969377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1714608, while the sum is 50.

The square root of 243969377 is about 15619.5191027125. The cubic root of 243969377 is about 624.8538341929.

The spelling of 243969377 in words is "two hundred forty-three million, nine hundred sixty-nine thousand, three hundred seventy-seven".