163329997 has 2 divisors, whose sum is σ = 163329998. Its totient is φ = 163329996.

The previous prime is 163329961. The next prime is 163330049. The reversal of 163329997 is 799923361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146264836 + 17065161 = 12094^2 + 4131^2 .

It is an emirp because it is prime and its reverse (799923361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163329997 - 2⁷ = 163329869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 163329997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163329497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81664998 + 81664999.

It is an arithmetic number, because the mean of its divisors is an integer number (81664999).

Almost surely, 2^163329997 is an apocalyptic number.

It is an amenable number.

163329997 is a deficient number, since it is larger than the sum of its proper divisors (1).

163329997 is an equidigital number, since it uses as much as digits as its factorization.

163329997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 551124, while the sum is 49.

The square root of 163329997 is about 12780.0624802855. The cubic root of 163329997 is about 546.6239440058.

The spelling of 163329997 in words is "one hundred sixty-three million, three hundred twenty-nine thousand, nine hundred ninety-seven".