9891297 has 24 divisors (see below), whose sum is σ = 16294824. Its totient is φ = 5727744.

The previous prime is 9891293. The next prime is 9891307. The reversal of 9891297 is 7921989.

9891297 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1648656 + 8242641 = 1284^2 + 2871^2 .

It is not a de Polignac number, because 9891297 - 2² = 9891293 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9891293) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 498 + ... + 4475.

It is an arithmetic number, because the mean of its divisors is an integer number (678951).

Almost surely, 2^9891297 is an apocalyptic number.

It is an amenable number.

9891297 is a deficient number, since it is larger than the sum of its proper divisors (6403527).

9891297 is a wasteful number, since it uses less digits than its factorization.

9891297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5009 (or 5006 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The square root of 9891297 is about 3145.0432429460. The cubic root of 9891297 is about 214.6599781339.

The spelling of 9891297 in words is "nine million, eight hundred ninety-one thousand, two hundred ninety-seven".