133555073 has 2 divisors, whose sum is σ = 133555074. Its totient is φ = 133555072.

The previous prime is 133555067. The next prime is 133555087. The reversal of 133555073 is 370555331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96491329 + 37063744 = 9823^2 + 6088^2 .

It is an emirp because it is prime and its reverse (370555331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133555073 - 2¹⁰ = 133554049 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (133555673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66777536 + 66777537.

It is an arithmetic number, because the mean of its divisors is an integer number (66777537).

Almost surely, 2^133555073 is an apocalyptic number.

It is an amenable number.

133555073 is a deficient number, since it is larger than the sum of its proper divisors (1).

133555073 is an equidigital number, since it uses as much as digits as its factorization.

133555073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23625, while the sum is 32.

The square root of 133555073 is about 11556.6030043434. The cubic root of 133555073 is about 511.1560000780.

The spelling of 133555073 in words is "one hundred thirty-three million, five hundred fifty-five thousand, seventy-three".