9897109 has 2 divisors, whose sum is σ = 9897110. Its totient is φ = 9897108.

The previous prime is 9897071. The next prime is 9897127. The reversal of 9897109 is 9017989.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9891025 + 6084 = 3145^2 + 78^2 .

It is a cyclic number.

It is not a de Polignac number, because 9897109 - 2⁷ = 9896981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9897809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4948554 + 4948555.

It is an arithmetic number, because the mean of its divisors is an integer number (4948555).

Almost surely, 2^9897109 is an apocalyptic number.

It is an amenable number.

9897109 is a deficient number, since it is larger than the sum of its proper divisors (1).

9897109 is an equidigital number, since it uses as much as digits as its factorization.

9897109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 43.

The square root of 9897109 is about 3145.9671009087. The cubic root of 9897109 is about 214.7020137239.

The spelling of 9897109 in words is "nine million, eight hundred ninety-seven thousand, one hundred nine".