133791158 has 4 divisors (see below), whose sum is σ = 200686740. Its totient is φ = 66895578.

The previous prime is 133791157. The next prime is 133791197. The reversal of 133791158 is 851197331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 851197331 = 53 ⋅16060327.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133791157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33447788 + ... + 33447791.

It is an arithmetic number, because the mean of its divisors is an integer number (50171685).

Almost surely, 2^133791158 is an apocalyptic number.

133791158 is a deficient number, since it is larger than the sum of its proper divisors (66895582).

133791158 is an equidigital number, since it uses as much as digits as its factorization.

133791158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66895581.

The product of its digits is 22680, while the sum is 38.

The square root of 133791158 is about 11566.8127848600. The cubic root of 133791158 is about 511.4570125490.

The spelling of 133791158 in words is "one hundred thirty-three million, seven hundred ninety-one thousand, one hundred fifty-eight".