168223613 has 2 divisors, whose sum is σ = 168223614. Its totient is φ = 168223612.

The previous prime is 168223607. The next prime is 168223621. The reversal of 168223613 is 316322861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91450969 + 76772644 = 9563^2 + 8762^2 .

It is an emirp because it is prime and its reverse (316322861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168223613 - 2⁴ = 168223597 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 168223613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168213613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84111806 + 84111807.

It is an arithmetic number, because the mean of its divisors is an integer number (84111807).

Almost surely, 2^168223613 is an apocalyptic number.

It is an amenable number.

168223613 is a deficient number, since it is larger than the sum of its proper divisors (1).

168223613 is an equidigital number, since it uses as much as digits as its factorization.

168223613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 32.

The square root of 168223613 is about 12970.1045870880. The cubic root of 168223613 is about 552.0295407509.

The spelling of 168223613 in words is "one hundred sixty-eight million, two hundred twenty-three thousand, six hundred thirteen".