91165849 has 4 divisors (see below), whose sum is σ = 96528564. Its totient is φ = 85803136.

The previous prime is 91165847. The next prime is 91165871. The reversal of 91165849 is 94856119.

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

It can be written as a sum of positive squares in 2 ways, for example, as 62916624 + 28249225 = 7932^2 + 5315^2 .

It is a cyclic number.

It is not a de Polignac number, because 91165849 - 2¹ = 91165847 is a prime.

It is a super-2 number, since 2×91165849² = 16622424047781602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91165843) 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, 2681332 + ... + 2681365.

It is an arithmetic number, because the mean of its divisors is an integer number (24132141).

Almost surely, 2^91165849 is an apocalyptic number.

It is an amenable number.

91165849 is a deficient number, since it is larger than the sum of its proper divisors (5362715).

91165849 is a wasteful number, since it uses less digits than its factorization.

91165849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5362714.

The product of its digits is 77760, while the sum is 43.

The square root of 91165849 is about 9548.0809066534. The cubic root of 91165849 is about 450.0672311073.

The spelling of 91165849 in words is "ninety-one million, one hundred sixty-five thousand, eight hundred forty-nine".