168413209 has 2 divisors, whose sum is σ = 168413210. Its totient is φ = 168413208.

The previous prime is 168413197. The next prime is 168413239. The reversal of 168413209 is 902314861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150798400 + 17614809 = 12280^2 + 4197^2 .

It is a cyclic number.

It is not a de Polignac number, because 168413209 - 2⁹ = 168412697 is a prime.

It is not a weakly prime, because it can be changed into another prime (168413239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84206604 + 84206605.

It is an arithmetic number, because the mean of its divisors is an integer number (84206605).

Almost surely, 2^168413209 is an apocalyptic number.

It is an amenable number.

168413209 is a deficient number, since it is larger than the sum of its proper divisors (1).

168413209 is an equidigital number, since it uses as much as digits as its factorization.

168413209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 168413209 is about 12977.4114907404. The cubic root of 168413209 is about 552.2368507229.

The spelling of 168413209 in words is "one hundred sixty-eight million, four hundred thirteen thousand, two hundred nine".