133491305 has 8 divisors (see below), whose sum is σ = 160574400. Its totient is φ = 106536496.

The previous prime is 133491251. The next prime is 133491311. The reversal of 133491305 is 503194331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133491305 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 29765 + ... + 33954.

It is an arithmetic number, because the mean of its divisors is an integer number (20071800).

Almost surely, 2^133491305 is an apocalyptic number.

It is an amenable number.

133491305 is a deficient number, since it is larger than the sum of its proper divisors (27083095).

133491305 is an equidigital number, since it uses as much as digits as its factorization.

133491305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64143.

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 133491305 is about 11553.8437327151. The cubic root of 133491305 is about 511.0746339314.

The spelling of 133491305 in words is "one hundred thirty-three million, four hundred ninety-one thousand, three hundred five".