91560065 has 4 divisors (see below), whose sum is σ = 109872084. Its totient is φ = 73248048.

The previous prime is 91560059. The next prime is 91560067. The reversal of 91560065 is 56006519.

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 17048641 + 74511424 = 4129^2 + 8632^2 .

It is a cyclic number.

It is not a de Polignac number, because 91560065 - 2¹⁴ = 91543681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91560067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9156002 + ... + 9156011.

It is an arithmetic number, because the mean of its divisors is an integer number (27468021).

Almost surely, 2^91560065 is an apocalyptic number.

It is an amenable number.

91560065 is a deficient number, since it is larger than the sum of its proper divisors (18312019).

91560065 is a wasteful number, since it uses less digits than its factorization.

91560065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18312018.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 91560065 is about 9568.7023676150. The cubic root of 91560065 is about 450.7150196588.

The spelling of 91560065 in words is "ninety-one million, five hundred sixty thousand, sixty-five".