17157147209 has 2 divisors, whose sum is σ = 17157147210. Its totient is φ = 17157147208.

The previous prime is 17157147173. The next prime is 17157147221. The reversal of 17157147209 is 90274175171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15195985984 + 1961161225 = 123272^2 + 44285^2 .

It is a cyclic number.

It is not a de Polignac number, because 17157147209 - 2²⁰ = 17156098633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 17157147209.

It is not a weakly prime, because it can be changed into another prime (17157147239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8578573604 + 8578573605.

It is an arithmetic number, because the mean of its divisors is an integer number (8578573605).

Almost surely, 2^17157147209 is an apocalyptic number.

It is an amenable number.

17157147209 is a deficient number, since it is larger than the sum of its proper divisors (1).

17157147209 is an equidigital number, since it uses as much as digits as its factorization.

17157147209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 123480, while the sum is 44.

The spelling of 17157147209 in words is "seventeen billion, one hundred fifty-seven million, one hundred forty-seven thousand, two hundred nine".