91164811 has 4 divisors (see below), whose sum is σ = 91271800. Its totient is φ = 91057824.

The previous prime is 91164803. The next prime is 91164817. The reversal of 91164811 is 11846119.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91164811 - 2³ = 91164803 is a prime.

It is a super-2 number, since 2×91164811² = 16622045529331442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91164817) 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 3 ways as a sum of consecutive naturals, for example, 52206 + ... + 53923.

It is an arithmetic number, because the mean of its divisors is an integer number (22817950).

Almost surely, 2^91164811 is an apocalyptic number.

91164811 is a deficient number, since it is larger than the sum of its proper divisors (106989).

91164811 is a wasteful number, since it uses less digits than its factorization.

91164811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106988.

The product of its digits is 1728, while the sum is 31.

The square root of 91164811 is about 9548.0265500259. The cubic root of 91164811 is about 450.0655229692.

The spelling of 91164811 in words is "ninety-one million, one hundred sixty-four thousand, eight hundred eleven".