989101989 has 16 divisors (see below), whose sum is σ = 1479848640. Its totient is φ = 652870800.

The previous prime is 989101979. The next prime is 989101991.

989101989 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 989101989 - 2¹¹ = 989099941 is a prime.

It is a super-2 number, since 2×989101989² = 1956645489287512242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989101909) 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, 178627 + ... + 184080.

It is an arithmetic number, because the mean of its divisors is an integer number (92490540).

Almost surely, 2^989101989 is an apocalyptic number.

It is an amenable number.

989101989 is a deficient number, since it is larger than the sum of its proper divisors (490746651).

989101989 is a wasteful number, since it uses less digits than its factorization.

989101989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362817 (or 362811 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 54.

The square root of 989101989 is about 31449.9918759926. The cubic root of 989101989 is about 996.3540528915.

The spelling of 989101989 in words is "nine hundred eighty-nine million, one hundred one thousand, nine hundred eighty-nine".