133291263 has 8 divisors (see below), whose sum is σ = 203110528. Its totient is φ = 76166424.

The previous prime is 133291259. The next prime is 133291303. The reversal of 133291263 is 362192331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 133291263 - 2² = 133291259 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133291263.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133291253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3173581 + ... + 3173622.

It is an arithmetic number, because the mean of its divisors is an integer number (25388816).

Almost surely, 2^133291263 is an apocalyptic number.

133291263 is a deficient number, since it is larger than the sum of its proper divisors (69819265).

133291263 is an equidigital number, since it uses as much as digits as its factorization.

133291263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6347213.

The product of its digits is 5832, while the sum is 30.

The square root of 133291263 is about 11545.1835412002. The cubic root of 133291263 is about 510.8192177880.

The spelling of 133291263 in words is "one hundred thirty-three million, two hundred ninety-one thousand, two hundred sixty-three".