989120941009 has 2 divisors, whose sum is σ = 989120941010. Its totient is φ = 989120941008.

The previous prime is 989120941007. The next prime is 989120941087. The reversal of 989120941009 is 900149021989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 914060284225 + 75060656784 = 956065^2 + 273972^2 .

It is a cyclic number.

It is not a de Polignac number, because 989120941009 - 2¹ = 989120941007 is a prime.

Together with 989120941007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (989120941007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494560470504 + 494560470505.

It is an arithmetic number, because the mean of its divisors is an integer number (494560470505).

Almost surely, 2^989120941009 is an apocalyptic number.

It is an amenable number.

989120941009 is a deficient number, since it is larger than the sum of its proper divisors (1).

989120941009 is an equidigital number, since it uses as much as digits as its factorization.

989120941009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 419904, while the sum is 52.

The spelling of 989120941009 in words is "nine hundred eighty-nine billion, one hundred twenty million, nine hundred forty-one thousand, nine".