168224789 has 2 divisors, whose sum is σ = 168224790. Its totient is φ = 168224788.

The previous prime is 168224761. The next prime is 168224827. The reversal of 168224789 is 987422861.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 157301764 + 10923025 = 12542^2 + 3305^2 .

It is an emirp because it is prime and its reverse (987422861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168224789 - 2¹² = 168220693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168224759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84112394 + 84112395.

It is an arithmetic number, because the mean of its divisors is an integer number (84112395).

Almost surely, 2^168224789 is an apocalyptic number.

It is an amenable number.

168224789 is a deficient number, since it is larger than the sum of its proper divisors (1).

168224789 is an equidigital number, since it uses as much as digits as its factorization.

168224789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 387072, while the sum is 47.

The square root of 168224789 is about 12970.1499220325. The cubic root of 168224789 is about 552.0308271046.

The spelling of 168224789 in words is "one hundred sixty-eight million, two hundred twenty-four thousand, seven hundred eighty-nine".