9170638121 has 2 divisors, whose sum is σ = 9170638122. Its totient is φ = 9170638120.

The previous prime is 9170638093. The next prime is 9170638189. The reversal of 9170638121 is 1218360719.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7493326096 + 1677312025 = 86564^2 + 40955^2 .

It is an emirp because it is prime and its reverse (1218360719) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9170638121 is a prime.

It is not a weakly prime, because it can be changed into another prime (9170638721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4585319060 + 4585319061.

It is an arithmetic number, because the mean of its divisors is an integer number (4585319061).

Almost surely, 2^9170638121 is an apocalyptic number.

It is an amenable number.

9170638121 is a deficient number, since it is larger than the sum of its proper divisors (1).

9170638121 is an equidigital number, since it uses as much as digits as its factorization.

9170638121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 9170638121 is about 95763.4487735274. The cubic root of 9170638121 is about 2093.1475905527.

The spelling of 9170638121 in words is "nine billion, one hundred seventy million, six hundred thirty-eight thousand, one hundred twenty-one".