91481183 has 4 divisors (see below), whose sum is σ = 91564200. Its totient is φ = 91398168.

The previous prime is 91481161. The next prime is 91481207. The reversal of 91481183 is 38118419.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38118419 = 181 ⋅210599.

It is a cyclic number.

It is not a de Polignac number, because 91481183 - 2⁶ = 91481119 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 (91481153) 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, 39833 + ... + 42066.

It is an arithmetic number, because the mean of its divisors is an integer number (22891050).

Almost surely, 2^91481183 is an apocalyptic number.

91481183 is a deficient number, since it is larger than the sum of its proper divisors (83017).

91481183 is a wasteful number, since it uses less digits than its factorization.

91481183 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83016.

The product of its digits is 6912, while the sum is 35.

The square root of 91481183 is about 9564.5796039345. The cubic root of 91481183 is about 450.5855472111.

The spelling of 91481183 in words is "ninety-one million, four hundred eighty-one thousand, one hundred eighty-three".