91285933 has 2 divisors, whose sum is σ = 91285934. Its totient is φ = 91285932.

The previous prime is 91285897. The next prime is 91285963. The reversal of 91285933 is 33958219.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74615044 + 16670889 = 8638^2 + 4083^2 .

It is an emirp because it is prime and its reverse (33958219) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91285933 - 2²⁵ = 57731501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91285963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45642966 + 45642967.

It is an arithmetic number, because the mean of its divisors is an integer number (45642967).

Almost surely, 2^91285933 is an apocalyptic number.

It is an amenable number.

91285933 is a deficient number, since it is larger than the sum of its proper divisors (1).

91285933 is an equidigital number, since it uses as much as digits as its factorization.

91285933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 40.

The square root of 91285933 is about 9554.3672213287. The cubic root of 91285933 is about 450.2647544910.

The spelling of 91285933 in words is "ninety-one million, two hundred eighty-five thousand, nine hundred thirty-three".