168082609 has 2 divisors, whose sum is σ = 168082610. Its totient is φ = 168082608.

The previous prime is 168082591. The next prime is 168082613. The reversal of 168082609 is 906280861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114383025 + 53699584 = 10695^2 + 7328^2 .

It is an emirp because it is prime and its reverse (906280861) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168082609 is a prime.

It is not a weakly prime, because it can be changed into another prime (168082619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84041304 + 84041305.

It is an arithmetic number, because the mean of its divisors is an integer number (84041305).

Almost surely, 2^168082609 is an apocalyptic number.

It is an amenable number.

168082609 is a deficient number, since it is larger than the sum of its proper divisors (1).

168082609 is an equidigital number, since it uses as much as digits as its factorization.

168082609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 168082609 is about 12964.6677165286. The cubic root of 168082609 is about 551.8752617132.

The spelling of 168082609 in words is "one hundred sixty-eight million, eighty-two thousand, six hundred nine".