243356387 has 2 divisors, whose sum is σ = 243356388. Its totient is φ = 243356386.

The previous prime is 243356381. The next prime is 243356441. The reversal of 243356387 is 783653342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243356387 - 2¹⁴ = 243340003 is a prime.

It is not a weakly prime, because it can be changed into another prime (243356381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121678193 + 121678194.

It is an arithmetic number, because the mean of its divisors is an integer number (121678194).

Almost surely, 2^243356387 is an apocalyptic number.

243356387 is a deficient number, since it is larger than the sum of its proper divisors (1).

243356387 is an equidigital number, since it uses as much as digits as its factorization.

243356387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 41.

The square root of 243356387 is about 15599.8841982881. The cubic root of 243356387 is about 624.3300657308.

The spelling of 243356387 in words is "two hundred forty-three million, three hundred fifty-six thousand, three hundred eighty-seven".