133828817 has 2 divisors, whose sum is σ = 133828818. Its totient is φ = 133828816.

The previous prime is 133828801. The next prime is 133828819. The reversal of 133828817 is 718828331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131239936 + 2588881 = 11456^2 + 1609^2 .

It is a cyclic number.

It is not a de Polignac number, because 133828817 - 2⁴ = 133828801 is a prime.

Together with 133828819, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (133828819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66914408 + 66914409.

It is an arithmetic number, because the mean of its divisors is an integer number (66914409).

Almost surely, 2^133828817 is an apocalyptic number.

It is an amenable number.

133828817 is a deficient number, since it is larger than the sum of its proper divisors (1).

133828817 is an equidigital number, since it uses as much as digits as its factorization.

133828817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 41.

The square root of 133828817 is about 11568.4405604213. The cubic root of 133828817 is about 511.5049956720.

The spelling of 133828817 in words is "one hundred thirty-three million, eight hundred twenty-eight thousand, eight hundred seventeen".