989849948989 has 4 divisors (see below), whose sum is σ = 1079836308000. Its totient is φ = 899863589980.

The previous prime is 989849948977. The next prime is 989849949059.

989849948989 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 989849948989 - 2¹¹ = 989849946941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 989849948897 and 989849948906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989849948089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44993179489 + ... + 44993179510.

It is an arithmetic number, because the mean of its divisors is an integer number (269959077000).

Almost surely, 2^989849948989 is an apocalyptic number.

It is an amenable number.

989849948989 is a deficient number, since it is larger than the sum of its proper divisors (89986359011).

989849948989 is a wasteful number, since it uses less digits than its factorization.

989849948989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89986359010.

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

The spelling of 989849948989 in words is "nine hundred eighty-nine billion, eight hundred forty-nine million, nine hundred forty-eight thousand, nine hundred eighty-nine".