168228439 has 2 divisors, whose sum is σ = 168228440. Its totient is φ = 168228438.

The previous prime is 168228409. The next prime is 168228443. The reversal of 168228439 is 934822861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 168228439 - 2¹⁷ = 168097367 is a prime.

It is equal to p_9409489 and since 168228439 and 9409489 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 168228395 and 168228404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168228409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84114219 + 84114220.

It is an arithmetic number, because the mean of its divisors is an integer number (84114220).

Almost surely, 2^168228439 is an apocalyptic number.

168228439 is a deficient number, since it is larger than the sum of its proper divisors (1).

168228439 is an equidigital number, since it uses as much as digits as its factorization.

168228439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 43.

The square root of 168228439 is about 12970.2906289720. The cubic root of 168228439 is about 552.0348195760.

The spelling of 168228439 in words is "one hundred sixty-eight million, two hundred twenty-eight thousand, four hundred thirty-nine".