9897884887989 has 16 divisors (see below), whose sum is σ = 15121871142912. Its totient is φ = 5641166764848.

The previous prime is 9897884887951. The next prime is 9897884888029.

9897884887989 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 9897884887989 - 2⁷ = 9897884887861 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9897884887893 and 9897884887902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9897884887589) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 615302469 + ... + 615318554.

It is an arithmetic number, because the mean of its divisors is an integer number (945116946432).

Almost surely, 2^{9897884887989} is an apocalyptic number.

It is an amenable number.

9897884887989 is a deficient number, since it is larger than the sum of its proper divisors (5223986254923).

9897884887989 is a wasteful number, since it uses less digits than its factorization.

9897884887989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1230621416.

The product of its digits is 337105649664, while the sum is 102.

The spelling of 9897884887989 in words is "nine trillion, eight hundred ninety-seven billion, eight hundred eighty-four million, eight hundred eighty-seven thousand, nine hundred eighty-nine".