91065575 has 12 divisors (see below), whose sum is σ = 118865160. Its totient is φ = 69017760.

The previous prime is 91065571. The next prime is 91065577. The reversal of 91065575 is 57556019.

It is not a de Polignac number, because 91065575 - 2² = 91065571 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91065571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95384 + ... + 96333.

It is an arithmetic number, because the mean of its divisors is an integer number (9905430).

Almost surely, 2^91065575 is an apocalyptic number.

91065575 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

91065575 is a deficient number, since it is larger than the sum of its proper divisors (27799585).

91065575 is a wasteful number, since it uses less digits than its factorization.

91065575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191746 (or 191741 counting only the distinct ones).

The product of its (nonzero) digits is 47250, while the sum is 38.

The square root of 91065575 is about 9542.8284591100. The cubic root of 91065575 is about 449.9021597988.

The spelling of 91065575 in words is "ninety-one million, sixty-five thousand, five hundred seventy-five".