243400427 has 2 divisors, whose sum is σ = 243400428. Its totient is φ = 243400426.

The previous prime is 243400403. The next prime is 243400457. The reversal of 243400427 is 724004342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243400427 - 2⁶ = 243400363 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 243400396 and 243400405.

It is not a weakly prime, because it can be changed into another prime (243400457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121700213 + 121700214.

It is an arithmetic number, because the mean of its divisors is an integer number (121700214).

Almost surely, 2^243400427 is an apocalyptic number.

243400427 is a deficient number, since it is larger than the sum of its proper divisors (1).

243400427 is an equidigital number, since it uses as much as digits as its factorization.

243400427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 26.

The square root of 243400427 is about 15601.2956833719. The cubic root of 243400427 is about 624.3677249543.

Adding to 243400427 its reverse (724004342), we get a palindrome (967404769).

The spelling of 243400427 in words is "two hundred forty-three million, four hundred thousand, four hundred twenty-seven".