133113191 has 4 divisors (see below), whose sum is σ = 133236072. Its totient is φ = 132990312.

The previous prime is 133113187. The next prime is 133113199. The reversal of 133113191 is 191311331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 191311331 = 67 ⋅2855393.

It is a cyclic number.

It is not a de Polignac number, because 133113191 - 2² = 133113187 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 (133113199) 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, 59801 + ... + 61986.

It is an arithmetic number, because the mean of its divisors is an integer number (33309018).

Almost surely, 2^133113191 is an apocalyptic number.

133113191 is a deficient number, since it is larger than the sum of its proper divisors (122881).

133113191 is a wasteful number, since it uses less digits than its factorization.

133113191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122880.

The product of its digits is 243, while the sum is 23.

The square root of 133113191 is about 11537.4690032086. The cubic root of 133113191 is about 510.5916381370.

The spelling of 133113191 in words is "one hundred thirty-three million, one hundred thirteen thousand, one hundred ninety-one".