163238317 has 6 divisors (see below), whose sum is σ = 179427374. Its totient is φ = 148398360.

The previous prime is 163238287. The next prime is 163238323. The reversal of 163238317 is 713832361.

It can be written as a sum of positive squares in only one way, i.e., 163098441 + 139876 = 12771^2 + 374^2 .

It is not a de Polignac number, because 163238317 - 2⁷ = 163238189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163238617) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 674418 + ... + 674659.

Almost surely, 2^163238317 is an apocalyptic number.

It is an amenable number.

163238317 is a deficient number, since it is larger than the sum of its proper divisors (16189057).

163238317 is a wasteful number, since it uses less digits than its factorization.

163238317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1349099 (or 1349088 counting only the distinct ones).

The product of its digits is 18144, while the sum is 34.

The square root of 163238317 is about 12776.4751398811. The cubic root of 163238317 is about 546.5216483186.

The spelling of 163238317 in words is "one hundred sixty-three million, two hundred thirty-eight thousand, three hundred seventeen".