173989369 has 2 divisors, whose sum is σ = 173989370. Its totient is φ = 173989368.

The previous prime is 173989313. The next prime is 173989379. The reversal of 173989369 is 963989371.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157828969 + 16160400 = 12563^2 + 4020^2 .

It is an emirp because it is prime and its reverse (963989371) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 173989369 - 2¹¹ = 173987321 is a prime.

It is a super-2 number, since 2×173989369² = 60544601050036322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (173989379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86994684 + 86994685.

It is an arithmetic number, because the mean of its divisors is an integer number (86994685).

Almost surely, 2^173989369 is an apocalyptic number.

It is an amenable number.

173989369 is a deficient number, since it is larger than the sum of its proper divisors (1).

173989369 is an equidigital number, since it uses as much as digits as its factorization.

173989369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2204496, while the sum is 55.

The square root of 173989369 is about 13190.5029851026. The cubic root of 173989369 is about 558.2656471202.

The spelling of 173989369 in words is "one hundred seventy-three million, nine hundred eighty-nine thousand, three hundred sixty-nine".