133508413 has 4 divisors (see below), whose sum is σ = 137815168. Its totient is φ = 129201660.

The previous prime is 133508407. The next prime is 133508477. The reversal of 133508413 is 314805331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 314805331 = 179 ⋅1758689.

It is a cyclic number.

It is not a de Polignac number, because 133508413 - 2¹³ = 133500221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133508213) 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, 2153331 + ... + 2153392.

It is an arithmetic number, because the mean of its divisors is an integer number (34453792).

Almost surely, 2^133508413 is an apocalyptic number.

It is an amenable number.

133508413 is a deficient number, since it is larger than the sum of its proper divisors (4306755).

133508413 is an equidigital number, since it uses as much as digits as its factorization.

133508413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4306754.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 133508413 is about 11554.5840686716. The cubic root of 133508413 is about 511.0964657937.

The spelling of 133508413 in words is "one hundred thirty-three million, five hundred eight thousand, four hundred thirteen".