9897111889 has 8 divisors (see below), whose sum is σ = 11313852480. Its totient is φ = 8481088176.

The previous prime is 9897111823. The next prime is 9897111919. The reversal of 9897111889 is 9881117989.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 9897111889 - 2¹¹ = 9897109841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9897111089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149299 + ... + 205144.

It is an arithmetic number, because the mean of its divisors is an integer number (1414231560).

Almost surely, 2^9897111889 is an apocalyptic number.

It is an amenable number.

9897111889 is a deficient number, since it is larger than the sum of its proper divisors (1416740591).

9897111889 is a wasteful number, since it uses less digits than its factorization.

9897111889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358439.

The product of its digits is 2612736, while the sum is 61.

The square root of 9897111889 is about 99484.2293481736. The cubic root of 9897111889 is about 2147.0203461460.

The spelling of 9897111889 in words is "nine billion, eight hundred ninety-seven million, one hundred eleven thousand, eight hundred eighty-nine".