133811047 has 2 divisors, whose sum is σ = 133811048. Its totient is φ = 133811046.

The previous prime is 133811039. The next prime is 133811059. The reversal of 133811047 is 740118331.

It is a weak prime.

It is an emirp because it is prime and its reverse (740118331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133811047 - 2³ = 133811039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133811077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66905523 + 66905524.

It is an arithmetic number, because the mean of its divisors is an integer number (66905524).

Almost surely, 2^133811047 is an apocalyptic number.

133811047 is a deficient number, since it is larger than the sum of its proper divisors (1).

133811047 is an equidigital number, since it uses as much as digits as its factorization.

133811047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 133811047 is about 11567.6724970929. The cubic root of 133811047 is about 511.4823551916.

Adding to 133811047 its reverse (740118331), we get a palindrome (873929378).

The spelling of 133811047 in words is "one hundred thirty-three million, eight hundred eleven thousand, forty-seven".