9638728317 has 6 divisors (see below), whose sum is σ = 13922607582. Its totient is φ = 6425818872.

The previous prime is 9638728313. The next prime is 9638728321. The reversal of 9638728317 is 7138278369.

It is an interprime number because it is at equal distance from previous prime (9638728313) and next prime (9638728321).

It can be written as a sum of positive squares in only one way, i.e., 4975750521 + 4662977796 = 70539^2 + 68286^2 .

It is not a de Polignac number, because 9638728317 - 2² = 9638728313 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9638728313) 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, 535484898 + ... + 535484915.

It is an arithmetic number, because the mean of its divisors is an integer number (2320434597).

Almost surely, 2^9638728317 is an apocalyptic number.

It is an amenable number.

9638728317 is a deficient number, since it is larger than the sum of its proper divisors (4283879265).

9638728317 is a wasteful number, since it uses less digits than its factorization.

9638728317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070969819 (or 1070969816 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The square root of 9638728317 is about 98177.0254030952. The cubic root of 9638728317 is about 2128.1712883073.

The spelling of 9638728317 in words is "nine billion, six hundred thirty-eight million, seven hundred twenty-eight thousand, three hundred seventeen".