989788509250199 has 2 divisors, whose sum is σ = 989788509250200. Its totient is φ = 989788509250198.

The previous prime is 989788509250193. The next prime is 989788509250207. The reversal of 989788509250199 is 991052905887989.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 989788509250199 - 2⁴⁰ = 988688997622423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989788509250193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494894254625099 + 494894254625100.

It is an arithmetic number, because the mean of its divisors is an integer number (494894254625100).

Almost surely, 2^{989788509250199} is an apocalyptic number.

989788509250199 is a deficient number, since it is larger than the sum of its proper divisors (1).

989788509250199 is an equidigital number, since it uses as much as digits as its factorization.

989788509250199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10581580800, while the sum is 89.

The spelling of 989788509250199 in words is "nine hundred eighty-nine trillion, seven hundred eighty-eight billion, five hundred nine million, two hundred fifty thousand, one hundred ninety-nine".