989019173 has 2 divisors, whose sum is σ = 989019174. Its totient is φ = 989019172.

The previous prime is 989019151. The next prime is 989019181. The reversal of 989019173 is 371910989.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 860718244 + 128300929 = 29338^2 + 11327^2 .

It is a cyclic number.

It is not a de Polignac number, because 989019173 - 2¹⁴ = 989002789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989019373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494509586 + 494509587.

It is an arithmetic number, because the mean of its divisors is an integer number (494509587).

Almost surely, 2^989019173 is an apocalyptic number.

It is an amenable number.

989019173 is a deficient number, since it is larger than the sum of its proper divisors (1).

989019173 is an equidigital number, since it uses as much as digits as its factorization.

989019173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 47.

The square root of 989019173 is about 31448.6752185207. The cubic root of 989019173 is about 996.3262443806.

The spelling of 989019173 in words is "nine hundred eighty-nine million, nineteen thousand, one hundred seventy-three".