168998663 has 2 divisors, whose sum is σ = 168998664. Its totient is φ = 168998662.

The previous prime is 168998659. The next prime is 168998677. The reversal of 168998663 is 366899861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 168998663 - 2² = 168998659 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 168998599 and 168998608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168998603) 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, 84499331 + 84499332.

It is an arithmetic number, because the mean of its divisors is an integer number (84499332).

Almost surely, 2^168998663 is an apocalyptic number.

168998663 is a deficient number, since it is larger than the sum of its proper divisors (1).

168998663 is an equidigital number, since it uses as much as digits as its factorization.

168998663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3359232, while the sum is 56.

The square root of 168998663 is about 12999.9485768214. The cubic root of 168998663 is about 552.8760233814.

The spelling of 168998663 in words is "one hundred sixty-eight million, nine hundred ninety-eight thousand, six hundred sixty-three".