168359909 has 2 divisors, whose sum is σ = 168359910. Its totient is φ = 168359908.

The previous prime is 168359887. The next prime is 168359927. The reversal of 168359909 is 909953861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92582884 + 75777025 = 9622^2 + 8705^2 .

It is an emirp because it is prime and its reverse (909953861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168359909 - 2¹² = 168355813 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168359809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84179954 + 84179955.

It is an arithmetic number, because the mean of its divisors is an integer number (84179955).

Almost surely, 2^168359909 is an apocalyptic number.

It is an amenable number.

168359909 is a deficient number, since it is larger than the sum of its proper divisors (1).

168359909 is an equidigital number, since it uses as much as digits as its factorization.

168359909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 524880, while the sum is 50.

The square root of 168359909 is about 12975.3577600003. The cubic root of 168359909 is about 552.1785866275.

The spelling of 168359909 in words is "one hundred sixty-eight million, three hundred fifty-nine thousand, nine hundred nine".