163788617 has 2 divisors, whose sum is σ = 163788618. Its totient is φ = 163788616.

The previous prime is 163788613. The next prime is 163788619. The reversal of 163788617 is 716887361.

163788617 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102495376 + 61293241 = 10124^2 + 7829^2 .

It is an emirp because it is prime and its reverse (716887361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163788617 - 2² = 163788613 is a prime.

It is a super-3 number, since 3×163788617³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 163788619, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (163788613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81894308 + 81894309.

It is an arithmetic number, because the mean of its divisors is an integer number (81894309).

Almost surely, 2^163788617 is an apocalyptic number.

It is an amenable number.

163788617 is a deficient number, since it is larger than the sum of its proper divisors (1).

163788617 is an equidigital number, since it uses as much as digits as its factorization.

163788617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 47.

The square root of 163788617 is about 12797.9926941689. The cubic root of 163788617 is about 547.1350940297.

The spelling of 163788617 in words is "one hundred sixty-three million, seven hundred eighty-eight thousand, six hundred seventeen".