9897117898 has 8 divisors (see below), whose sum is σ = 15627028320. Its totient is φ = 4688108460.

The previous prime is 9897117889. The next prime is 9897117913. The reversal of 9897117898 is 8987117989.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130225198 + ... + 130225273.

It is an arithmetic number, because the mean of its divisors is an integer number (1953378540).

Almost surely, 2^9897117898 is an apocalyptic number.

9897117898 is a deficient number, since it is larger than the sum of its proper divisors (5729910422).

9897117898 is a wasteful number, since it uses less digits than its factorization.

9897117898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260450492.

The product of its digits is 18289152, while the sum is 67.

The square root of 9897117898 is about 99484.2595489357. The cubic root of 9897117898 is about 2147.0207806648.

Subtracting from 9897117898 its reverse (8987117989), we obtain a palindrome (909999909).

The spelling of 9897117898 in words is "nine billion, eight hundred ninety-seven million, one hundred seventeen thousand, eight hundred ninety-eight".