168406949 has 2 divisors, whose sum is σ = 168406950. Its totient is φ = 168406948.

The previous prime is 168406939. The next prime is 168406991. The reversal of 168406949 is 949604861.

It is a happy number.

168406949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142038724 + 26368225 = 11918^2 + 5135^2 .

It is an emirp because it is prime and its reverse (949604861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168406949 - 2⁴ = 168406933 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168406939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84203474 + 84203475.

It is an arithmetic number, because the mean of its divisors is an integer number (84203475).

Almost surely, 2^168406949 is an apocalyptic number.

It is an amenable number.

168406949 is a deficient number, since it is larger than the sum of its proper divisors (1).

168406949 is an equidigital number, since it uses as much as digits as its factorization.

168406949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 168406949 is about 12977.1703001849. The cubic root of 168406949 is about 552.2300083350.

The spelling of 168406949 in words is "one hundred sixty-eight million, four hundred six thousand, nine hundred forty-nine".