133871117 has 2 divisors, whose sum is σ = 133871118. Its totient is φ = 133871116.

The previous prime is 133871099. The next prime is 133871119. The reversal of 133871117 is 711178331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133310116 + 561001 = 11546^2 + 749^2 .

It is a cyclic number.

It is not a de Polignac number, because 133871117 - 2⁸ = 133870861 is a prime.

Together with 133871119, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133871119) 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, 66935558 + 66935559.

It is an arithmetic number, because the mean of its divisors is an integer number (66935559).

Almost surely, 2^133871117 is an apocalyptic number.

It is an amenable number.

133871117 is a deficient number, since it is larger than the sum of its proper divisors (1).

133871117 is an equidigital number, since it uses as much as digits as its factorization.

133871117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3528, while the sum is 32.

The square root of 133871117 is about 11570.2686658521. The cubic root of 133871117 is about 511.5588813811.

The spelling of 133871117 in words is "one hundred thirty-three million, eight hundred seventy-one thousand, one hundred seventeen".