989201099 has 2 divisors, whose sum is σ = 989201100. Its totient is φ = 989201098.

The previous prime is 989201093. The next prime is 989201119. The reversal of 989201099 is 990102989.

It is a weak prime.

It is an emirp because it is prime and its reverse (990102989) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-989201099 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (989201093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494600549 + 494600550.

It is an arithmetic number, because the mean of its divisors is an integer number (494600550).

Almost surely, 2^989201099 is an apocalyptic number.

989201099 is a deficient number, since it is larger than the sum of its proper divisors (1).

989201099 is an equidigital number, since it uses as much as digits as its factorization.

989201099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 47.

The square root of 989201099 is about 31451.5675126058. The cubic root of 989201099 is about 996.3873306704.

The spelling of 989201099 in words is "nine hundred eighty-nine million, two hundred one thousand, ninety-nine".