9065840891 has 4 divisors (see below), whose sum is σ = 9068760000. Its totient is φ = 9062921784.

The previous prime is 9065840881. The next prime is 9065840897. The reversal of 9065840891 is 1980485609.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1980485609 = 53 ⋅37367653.

It is a cyclic number.

It is not a de Polignac number, because 9065840891 - 2¹⁴ = 9065824507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9065840897) 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, 1454891 + ... + 1461108.

It is an arithmetic number, because the mean of its divisors is an integer number (2267190000).

Almost surely, 2^9065840891 is an apocalyptic number.

9065840891 is a deficient number, since it is larger than the sum of its proper divisors (2919109).

9065840891 is a wasteful number, since it uses less digits than its factorization.

9065840891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2919108.

The product of its (nonzero) digits is 622080, while the sum is 50.

The square root of 9065840891 is about 95214.7094255924. The cubic root of 9065840891 is about 2085.1438953571.

The spelling of 9065840891 in words is "nine billion, sixty-five million, eight hundred forty thousand, eight hundred ninety-one".