91217083 has 16 divisors (see below), whose sum is σ = 95961600. Its totient is φ = 86635296.

The previous prime is 91217069. The next prime is 91217089. The reversal of 91217083 is 38071219.

It is a cyclic number.

It is not a de Polignac number, because 91217083 - 2¹⁷ = 91086011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91217089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 261193 + ... + 261541.

It is an arithmetic number, because the mean of its divisors is an integer number (5997600).

Almost surely, 2^91217083 is an apocalyptic number.

91217083 is a deficient number, since it is larger than the sum of its proper divisors (4744517).

91217083 is a wasteful number, since it uses less digits than its factorization.

91217083 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 91217083 is about 9550.7634773352. The cubic root of 91217083 is about 450.1515259265.

The spelling of 91217083 in words is "ninety-one million, two hundred seventeen thousand, eighty-three".