91283133 has 4 divisors (see below), whose sum is σ = 121710848. Its totient is φ = 60855420.

The previous prime is 91283123. The next prime is 91283161. The reversal of 91283133 is 33138219.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 91283133 - 2¹⁰ = 91282109 is a prime.

It is a super-2 number, since 2×91283133² = 16665220740591378, which contains 22 as substring.

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 91283133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91283123) 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, 15213853 + ... + 15213858.

It is an arithmetic number, because the mean of its divisors is an integer number (30427712).

Almost surely, 2^91283133 is an apocalyptic number.

It is an amenable number.

91283133 is a deficient number, since it is larger than the sum of its proper divisors (30427715).

91283133 is a wasteful number, since it uses less digits than its factorization.

91283133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30427714.

The product of its digits is 3888, while the sum is 30.

The square root of 91283133 is about 9554.2206903546. The cubic root of 91283133 is about 450.2601508090.

The spelling of 91283133 in words is "ninety-one million, two hundred eighty-three thousand, one hundred thirty-three".