91165745 has 16 divisors (see below), whose sum is σ = 119895552. Its totient is φ = 65996160.

The previous prime is 91165727. The next prime is 91165769. The reversal of 91165745 is 54756119.

It is not a de Polignac number, because 91165745 - 2⁸ = 91165489 is a prime.

It is a super-2 number, since 2×91165745² = 16622386122810050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91165699 and 91165708.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 8549 + ... + 15981.

It is an arithmetic number, because the mean of its divisors is an integer number (7493472).

Almost surely, 2^91165745 is an apocalyptic number.

It is an amenable number.

91165745 is a deficient number, since it is larger than the sum of its proper divisors (28729807).

91165745 is a wasteful number, since it uses less digits than its factorization.

91165745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7672.

The product of its digits is 37800, while the sum is 38.

The square root of 91165745 is about 9548.0754605313. The cubic root of 91165745 is about 450.0670599649.

The spelling of 91165745 in words is "ninety-one million, one hundred sixty-five thousand, seven hundred forty-five".