989120117 has 2 divisors, whose sum is σ = 989120118. Its totient is φ = 989120116.

The previous prime is 989120071. The next prime is 989120141. The reversal of 989120117 is 711021989.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 939361201 + 49758916 = 30649^2 + 7054^2 .

It is a cyclic number.

It is not a de Polignac number, because 989120117 - 2¹⁰ = 989119093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989120017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494560058 + 494560059.

It is an arithmetic number, because the mean of its divisors is an integer number (494560059).

Almost surely, 2^989120117 is an apocalyptic number.

It is an amenable number.

989120117 is a deficient number, since it is larger than the sum of its proper divisors (1).

989120117 is an equidigital number, since it uses as much as digits as its factorization.

989120117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 38.

The square root of 989120117 is about 31450.2800782441. The cubic root of 989120117 is about 996.3601398256.

The spelling of 989120117 in words is "nine hundred eighty-nine million, one hundred twenty thousand, one hundred seventeen".