168353789 has 2 divisors, whose sum is σ = 168353790. Its totient is φ = 168353788.

The previous prime is 168353743. The next prime is 168353791. The reversal of 168353789 is 987353861.

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., 106605625 + 61748164 = 10325^2 + 7858^2 .

It is a cyclic number.

It is not a de Polignac number, because 168353789 - 2¹² = 168349693 is a prime.

Together with 168353791, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168353089) 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, 84176894 + 84176895.

It is an arithmetic number, because the mean of its divisors is an integer number (84176895).

Almost surely, 2^168353789 is an apocalyptic number.

It is an amenable number.

168353789 is a deficient number, since it is larger than the sum of its proper divisors (1).

168353789 is an equidigital number, since it uses as much as digits as its factorization.

168353789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 50.

The square root of 168353789 is about 12975.1219262094. The cubic root of 168353789 is about 552.1718958543.

The spelling of 168353789 in words is "one hundred sixty-eight million, three hundred fifty-three thousand, seven hundred eighty-nine".