989894498989 has 16 divisors (see below), whose sum is σ = 1094207400000. Its totient is φ = 888009217920.

The previous prime is 989894498981. The next prime is 989894499007.

989894498989 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 989894498989 - 2³ = 989894498981 is a prime.

It is a super-2 number, since 2×989894498989² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 989894498897 and 989894498906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989894498981) 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, 524634 + ... + 1501675.

It is an arithmetic number, because the mean of its divisors is an integer number (68387962500).

Almost surely, 2^989894498989 is an apocalyptic number.

It is an amenable number.

989894498989 is a deficient number, since it is larger than the sum of its proper divisors (104312901011).

989894498989 is a wasteful number, since it uses less digits than its factorization.

989894498989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2026908.

The product of its digits is 34828517376, while the sum is 94.

The spelling of 989894498989 in words is "nine hundred eighty-nine billion, eight hundred ninety-four million, four hundred ninety-eight thousand, nine hundred eighty-nine".