989896109 has 2 divisors, whose sum is σ = 989896110. Its totient is φ = 989896108.

The previous prime is 989896099. The next prime is 989896153. The reversal of 989896109 is 901698989.

989896109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 755040484 + 234855625 = 27478^2 + 15325^2 .

It is a cyclic number.

It is not a de Polignac number, because 989896109 - 2⁸ = 989895853 is a prime.

It is a super-2 number, since 2×989896109² = 1959788613226679762, which contains 22 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989866109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494948054 + 494948055.

It is an arithmetic number, because the mean of its divisors is an integer number (494948055).

Almost surely, 2^989896109 is an apocalyptic number.

It is an amenable number.

989896109 is a deficient number, since it is larger than the sum of its proper divisors (1).

989896109 is an equidigital number, since it uses as much as digits as its factorization.

989896109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2519424, while the sum is 59.

The square root of 989896109 is about 31462.6144654255. The cubic root of 989896109 is about 996.6206290496.

The spelling of 989896109 in words is "nine hundred eighty-nine million, eight hundred ninety-six thousand, one hundred nine".