191190133 has 4 divisors (see below), whose sum is σ = 194797548. Its totient is φ = 187582720.

The previous prime is 191190091. The next prime is 191190151. The reversal of 191190133 is 331091191.

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

It can be written as a sum of positive squares in 2 ways, for example, as 143952004 + 47238129 = 11998^2 + 6873^2 .

It is a cyclic number.

It is not a de Polignac number, because 191190133 - 2¹⁷ = 191059061 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 (191190173) 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, 1803628 + ... + 1803733.

It is an arithmetic number, because the mean of its divisors is an integer number (48699387).

Almost surely, 2^191190133 is an apocalyptic number.

It is an amenable number.

191190133 is a deficient number, since it is larger than the sum of its proper divisors (3607415).

191190133 is an equidigital number, since it uses as much as digits as its factorization.

191190133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3607414.

The product of its (nonzero) digits is 729, while the sum is 28.

The square root of 191190133 is about 13827.1520205717. The cubic root of 191190133 is about 576.0875528000.

The spelling of 191190133 in words is "one hundred ninety-one million, one hundred ninety thousand, one hundred thirty-three".