168808649 has 2 divisors, whose sum is σ = 168808650. Its totient is φ = 168808648.

The previous prime is 168808643. The next prime is 168808667. The reversal of 168808649 is 946808861.

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., 122500624 + 46308025 = 11068^2 + 6805^2 .

It is a cyclic number.

It is not a de Polignac number, because 168808649 - 2¹² = 168804553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 168808597 and 168808606.

It is not a weakly prime, because it can be changed into another prime (168808643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84404324 + 84404325.

It is an arithmetic number, because the mean of its divisors is an integer number (84404325).

Almost surely, 2^168808649 is an apocalyptic number.

It is an amenable number.

168808649 is a deficient number, since it is larger than the sum of its proper divisors (1).

168808649 is an equidigital number, since it uses as much as digits as its factorization.

168808649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 663552, while the sum is 50.

The square root of 168808649 is about 12992.6382617234. The cubic root of 168808649 is about 552.6687365700.

The spelling of 168808649 in words is "one hundred sixty-eight million, eight hundred eight thousand, six hundred forty-nine".