133813297 has 2 divisors, whose sum is σ = 133813298. Its totient is φ = 133813296.

The previous prime is 133813261. The next prime is 133813313. The reversal of 133813297 is 792318331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117418896 + 16394401 = 10836^2 + 4049^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133813297 is a prime.

It is not a weakly prime, because it can be changed into another prime (133813697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66906648 + 66906649.

It is an arithmetic number, because the mean of its divisors is an integer number (66906649).

Almost surely, 2^133813297 is an apocalyptic number.

It is an amenable number.

133813297 is a deficient number, since it is larger than the sum of its proper divisors (1).

133813297 is an equidigital number, since it uses as much as digits as its factorization.

133813297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 37.

The square root of 133813297 is about 11567.7697504748. The cubic root of 133813297 is about 511.4852219924.

The spelling of 133813297 in words is "one hundred thirty-three million, eight hundred thirteen thousand, two hundred ninety-seven".