133400243 has 2 divisors, whose sum is σ = 133400244. Its totient is φ = 133400242.

The previous prime is 133400237. The next prime is 133400251. The reversal of 133400243 is 342004331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133400243 - 2⁴ = 133400227 is a prime.

It is not a weakly prime, because it can be changed into another prime (133400213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66700121 + 66700122.

It is an arithmetic number, because the mean of its divisors is an integer number (66700122).

Almost surely, 2^133400243 is an apocalyptic number.

133400243 is a deficient number, since it is larger than the sum of its proper divisors (1).

133400243 is an equidigital number, since it uses as much as digits as its factorization.

133400243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 133400243 is about 11549.9022939590. The cubic root of 133400243 is about 510.9583964863.

Adding to 133400243 its reverse (342004331), we get a palindrome (475404574).

The spelling of 133400243 in words is "one hundred thirty-three million, four hundred thousand, two hundred forty-three".