133205497 has 4 divisors (see below), whose sum is σ = 137798820. Its totient is φ = 128612176.

The previous prime is 133205467. The next prime is 133205503. The reversal of 133205497 is 794502331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71048041 + 62157456 = 8429^2 + 7884^2 .

It is a cyclic number.

It is not a de Polignac number, because 133205497 - 2²³ = 124816889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133205467) 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 in 3 ways as a sum of consecutive naturals, for example, 2296618 + ... + 2296675.

It is an arithmetic number, because the mean of its divisors is an integer number (34449705).

Almost surely, 2^133205497 is an apocalyptic number.

It is an amenable number.

133205497 is a deficient number, since it is larger than the sum of its proper divisors (4593323).

133205497 is an equidigital number, since it uses as much as digits as its factorization.

133205497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4593322.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 133205497 is about 11541.4685807310. The cubic root of 133205497 is about 510.7096324081.

The spelling of 133205497 in words is "one hundred thirty-three million, two hundred five thousand, four hundred ninety-seven".