91165049 has 4 divisors (see below), whose sum is σ = 92659620. Its totient is φ = 89670480.

The previous prime is 91165043. The next prime is 91165121. The reversal of 91165049 is 94056119.

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 51222649 + 39942400 = 7157^2 + 6320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91165049 is a prime.

It is a super-2 number, since 2×91165049² = 16622132318344802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91165043) 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, 747194 + ... + 747315.

It is an arithmetic number, because the mean of its divisors is an integer number (23164905).

Almost surely, 2^91165049 is an apocalyptic number.

It is an amenable number.

91165049 is a deficient number, since it is larger than the sum of its proper divisors (1494571).

91165049 is a wasteful number, since it uses less digits than its factorization.

91165049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1494570.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 91165049 is about 9548.0390133262. The cubic root of 91165049 is about 450.0659146244.

The spelling of 91165049 in words is "ninety-one million, one hundred sixty-five thousand, forty-nine".