133691219 has 4 divisors (see below), whose sum is σ = 134989296. Its totient is φ = 132393144.

The previous prime is 133691209. The next prime is 133691221. The reversal of 133691219 is 912196331.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133691219 is a prime.

It is a super-2 number, since 2×133691219² = 35746684075411922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133691209) 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, 648884 + ... + 649089.

It is an arithmetic number, because the mean of its divisors is an integer number (33747324).

Almost surely, 2^133691219 is an apocalyptic number.

133691219 is a deficient number, since it is larger than the sum of its proper divisors (1298077).

133691219 is a wasteful number, since it uses less digits than its factorization.

133691219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1298076.

The product of its digits is 8748, while the sum is 35.

The square root of 133691219 is about 11562.4919026999. The cubic root of 133691219 is about 511.3296318473.

The spelling of 133691219 in words is "one hundred thirty-three million, six hundred ninety-one thousand, two hundred nineteen".