9135891 has 12 divisors (see below), whose sum is σ = 13265200. Its totient is φ = 6058800.

The previous prime is 9135883. The next prime is 9135901. The reversal of 9135891 is 1985319.

It is a happy number.

9135891 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9135891 - 2³ = 9135883 is a prime.

It is a Duffinian number.

9135891 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9135811) 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, 760 + ... + 4341.

Almost surely, 2^9135891 is an apocalyptic number.

9135891 is a deficient number, since it is larger than the sum of its proper divisors (4129309).

9135891 is a wasteful number, since it uses less digits than its factorization.

9135891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5306 (or 5303 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The square root of 9135891 is about 3022.5636469725. The cubic root of 9135891 is about 209.0500631732.

The spelling of 9135891 in words is "nine million, one hundred thirty-five thousand, eight hundred ninety-one".