133191263 has 4 divisors (see below), whose sum is σ = 134163600. Its totient is φ = 132218928.

The previous prime is 133191251. The next prime is 133191269. The reversal of 133191263 is 362191331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 362191331 = 1031 ⋅351301.

It is a cyclic number.

It is not a de Polignac number, because 133191263 - 2⁶ = 133191199 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 (133191269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 485963 + ... + 486236.

It is an arithmetic number, because the mean of its divisors is an integer number (33540900).

Almost surely, 2^133191263 is an apocalyptic number.

133191263 is a deficient number, since it is larger than the sum of its proper divisors (972337).

133191263 is an equidigital number, since it uses as much as digits as its factorization.

133191263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972336.

The product of its digits is 2916, while the sum is 29.

The square root of 133191263 is about 11540.8519182944. The cubic root of 133191263 is about 510.6914407168.

The spelling of 133191263 in words is "one hundred thirty-three million, one hundred ninety-one thousand, two hundred sixty-three".