133193913 has 8 divisors (see below), whose sum is σ = 177646848. Its totient is φ = 88768464.

The previous prime is 133193881. The next prime is 133193959. The reversal of 133193913 is 319391331.

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

It is not a de Polignac number, because 133193913 - 2⁵ = 133193881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133193993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11320 + ... + 19862.

It is an arithmetic number, because the mean of its divisors is an integer number (22205856).

Almost surely, 2^133193913 is an apocalyptic number.

It is an amenable number.

133193913 is a deficient number, since it is larger than the sum of its proper divisors (44452935).

133193913 is an equidigital number, since it uses as much as digits as its factorization.

133193913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13743.

The product of its digits is 6561, while the sum is 33.

The square root of 133193913 is about 11540.9667272720. The cubic root of 133193913 is about 510.6948276340.

The spelling of 133193913 in words is "one hundred thirty-three million, one hundred ninety-three thousand, nine hundred thirteen".