989050109 has 2 divisors, whose sum is σ = 989050110. Its totient is φ = 989050108.

The previous prime is 989050091. The next prime is 989050129. The reversal of 989050109 is 901050989.

Together with previous prime (989050091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 553284484 + 435765625 = 23522^2 + 20875^2 .

It is a cyclic number.

It is not a de Polignac number, because 989050109 - 2¹² = 989046013 is a prime.

It is a super-3 number, since 3×989050109³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 (989050129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494525054 + 494525055.

It is an arithmetic number, because the mean of its divisors is an integer number (494525055).

Almost surely, 2^989050109 is an apocalyptic number.

It is an amenable number.

989050109 is a deficient number, since it is larger than the sum of its proper divisors (1).

989050109 is an equidigital number, since it uses as much as digits as its factorization.

989050109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 41.

The square root of 989050109 is about 31449.1670636918. The cubic root of 989050109 is about 996.3366324594.

The spelling of 989050109 in words is "nine hundred eighty-nine million, fifty thousand, one hundred nine".