133918091 has 2 divisors, whose sum is σ = 133918092. Its totient is φ = 133918090.

The previous prime is 133918073. The next prime is 133918117. The reversal of 133918091 is 190819331.

It is a weak prime.

It is an emirp because it is prime and its reverse (190819331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133918091 - 2¹⁰ = 133917067 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (133918051) 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, 66959045 + 66959046.

It is an arithmetic number, because the mean of its divisors is an integer number (66959046).

Almost surely, 2^133918091 is an apocalyptic number.

133918091 is a deficient number, since it is larger than the sum of its proper divisors (1).

133918091 is an equidigital number, since it uses as much as digits as its factorization.

133918091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 133918091 is about 11572.2984320316. The cubic root of 133918091 is about 511.6187079699.

The spelling of 133918091 in words is "one hundred thirty-three million, nine hundred eighteen thousand, ninety-one".