91082911 has 4 divisors (see below), whose sum is σ = 91984824. Its totient is φ = 90181000.

The previous prime is 91082899. The next prime is 91082917. The reversal of 91082911 is 11928019.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11928019 = 29 ⋅411311.

It is a cyclic number.

It is not a de Polignac number, because 91082911 - 2¹¹ = 91080863 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 (91082917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 450805 + ... + 451006.

It is an arithmetic number, because the mean of its divisors is an integer number (22996206).

Almost surely, 2^91082911 is an apocalyptic number.

91082911 is a deficient number, since it is larger than the sum of its proper divisors (901913).

91082911 is a wasteful number, since it uses less digits than its factorization.

91082911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901912.

The product of its (nonzero) digits is 1296, while the sum is 31.

The square root of 91082911 is about 9543.7367419685. The cubic root of 91082911 is about 449.9307070260.

The spelling of 91082911 in words is "ninety-one million, eighty-two thousand, nine hundred eleven".