168920663 has 2 divisors, whose sum is σ = 168920664. Its totient is φ = 168920662.

The previous prime is 168920639. The next prime is 168920669. The reversal of 168920663 is 366029861.

It is a strong prime.

It is an emirp because it is prime and its reverse (366029861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168920663 - 2²⁴ = 152143447 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 168920663.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168920669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84460331 + 84460332.

It is an arithmetic number, because the mean of its divisors is an integer number (84460332).

Almost surely, 2^168920663 is an apocalyptic number.

168920663 is a deficient number, since it is larger than the sum of its proper divisors (1).

168920663 is an equidigital number, since it uses as much as digits as its factorization.

168920663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 168920663 is about 12996.9482187166. The cubic root of 168920663 is about 552.7909517694.

The spelling of 168920663 in words is "one hundred sixty-eight million, nine hundred twenty thousand, six hundred sixty-three".