133908293 has 2 divisors, whose sum is σ = 133908294. Its totient is φ = 133908292.

The previous prime is 133908259. The next prime is 133908317. The reversal of 133908293 is 392809331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97160449 + 36747844 = 9857^2 + 6062^2 .

It is a cyclic number.

It is not a de Polignac number, because 133908293 - 2⁸ = 133908037 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133908893) 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, 66954146 + 66954147.

It is an arithmetic number, because the mean of its divisors is an integer number (66954147).

Almost surely, 2^133908293 is an apocalyptic number.

It is an amenable number.

133908293 is a deficient number, since it is larger than the sum of its proper divisors (1).

133908293 is an equidigital number, since it uses as much as digits as its factorization.

133908293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 133908293 is about 11571.8750857413. The cubic root of 133908293 is about 511.6062302872.

The spelling of 133908293 in words is "one hundred thirty-three million, nine hundred eight thousand, two hundred ninety-three".