989689986989 has 8 divisors (see below), whose sum is σ = 1079681943360. Its totient is φ = 899701387200.

The previous prime is 989689986983. The next prime is 989689987009.

989689986989 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 989689986989 - 2⁴ = 989689986973 is a prime.

It is a super-2 number, since 2×989689986989² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 989689986895 and 989689986904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989689986983) 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, 201569 + ... + 1421270.

It is an arithmetic number, because the mean of its divisors is an integer number (134960242920).

Almost surely, 2^989689986989 is an apocalyptic number.

It is an amenable number.

989689986989 is a deficient number, since it is larger than the sum of its proper divisors (89991956371).

989689986989 is a wasteful number, since it uses less digits than its factorization.

989689986989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1678291.

The product of its digits is 78364164096, while the sum is 98.

The spelling of 989689986989 in words is "nine hundred eighty-nine billion, six hundred eighty-nine million, nine hundred eighty-six thousand, nine hundred eighty-nine".