91506233 has 12 divisors (see below), whose sum is σ = 113243328. Its totient is φ = 72399600.

The previous prime is 91506221. The next prime is 91506241. The reversal of 91506233 is 33260519.

It is not a de Polignac number, because 91506233 - 2¹⁸ = 91244089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91506196 and 91506205.

It is not an unprimeable number, because it can be changed into a prime (91505233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37493 + ... + 39858.

It is an arithmetic number, because the mean of its divisors is an integer number (9436944).

Almost surely, 2^91506233 is an apocalyptic number.

It is an amenable number.

91506233 is a deficient number, since it is larger than the sum of its proper divisors (21737095).

91506233 is a wasteful number, since it uses less digits than its factorization.

91506233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77384 (or 77371 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 91506233 is about 9565.8890334354. The cubic root of 91506233 is about 450.6266709246.

The spelling of 91506233 in words is "ninety-one million, five hundred six thousand, two hundred thirty-three".