133634819 has 2 divisors, whose sum is σ = 133634820. Its totient is φ = 133634818.

The previous prime is 133634801. The next prime is 133634821. The reversal of 133634819 is 918436331.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133634819 - 2¹² = 133630723 is a prime.

It is a super-2 number, since 2×133634819² = 35716529698325522, which contains 22 as substring.

Together with 133634821, 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 (133634719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66817409 + 66817410.

It is an arithmetic number, because the mean of its divisors is an integer number (66817410).

Almost surely, 2^133634819 is an apocalyptic number.

133634819 is a deficient number, since it is larger than the sum of its proper divisors (1).

133634819 is an equidigital number, since it uses as much as digits as its factorization.

133634819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 38.

The square root of 133634819 is about 11560.0527247933. The cubic root of 133634819 is about 511.2577172573.

The spelling of 133634819 in words is "one hundred thirty-three million, six hundred thirty-four thousand, eight hundred nineteen".