133504249 has 4 divisors (see below), whose sum is σ = 133528564. Its totient is φ = 133479936.

The previous prime is 133504229. The next prime is 133504271. The reversal of 133504249 is 942405331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 942405331 = 7 ⋅134629333.

It can be written as a sum of positive squares in 2 ways, for example, as 54169600 + 79334649 = 7360^2 + 8907^2 .

It is a cyclic number.

It is not a de Polignac number, because 133504249 - 2¹³ = 133496057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133504249.

It is not an unprimeable number, because it can be changed into a prime (133504219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 409 + ... + 16345.

It is an arithmetic number, because the mean of its divisors is an integer number (33382141).

Almost surely, 2^133504249 is an apocalyptic number.

It is an amenable number.

133504249 is a deficient number, since it is larger than the sum of its proper divisors (24315).

133504249 is an equidigital number, since it uses as much as digits as its factorization.

133504249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24314.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 133504249 is about 11554.4038790411. The cubic root of 133504249 is about 511.0911522014.

The spelling of 133504249 in words is "one hundred thirty-three million, five hundred four thousand, two hundred forty-nine".