9065991 has 16 divisors (see below), whose sum is σ = 13495680. Its totient is φ = 5365920.

The previous prime is 9065963. The next prime is 9066011. The reversal of 9065991 is 1995609.

It is not a de Polignac number, because 9065991 - 2⁹ = 9065479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9065591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1776 + ... + 4613.

It is an arithmetic number, because the mean of its divisors is an integer number (843480).

Almost surely, 2^9065991 is an apocalyptic number.

9065991 is a deficient number, since it is larger than the sum of its proper divisors (4429689).

9065991 is a wasteful number, since it uses less digits than its factorization.

9065991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6446.

The product of its (nonzero) digits is 21870, while the sum is 39.

The square root of 9065991 is about 3010.9784124102. The cubic root of 9065991 is about 208.5155403653.

The spelling of 9065991 in words is "nine million, sixty-five thousand, nine hundred ninety-one".