969609713721217 has 2 divisors, whose sum is σ = 969609713721218. Its totient is φ = 969609713721216.

The previous prime is 969609713721199. The next prime is 969609713721347. The reversal of 969609713721217 is 712127317906969.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 744951463852401 + 224658249868816 = 27293799^2 + 14988604^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-969609713721217 is a prime.

It is a super-2 number, since 2×969609713721217² (a number of 31 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (969609713721617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 484804856860608 + 484804856860609.

It is an arithmetic number, because the mean of its divisors is an integer number (484804856860609).

Almost surely, 2^{969609713721217} is an apocalyptic number.

It is an amenable number.

969609713721217 is a deficient number, since it is larger than the sum of its proper divisors (1).

969609713721217 is an equidigital number, since it uses as much as digits as its factorization.

969609713721217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108020304, while the sum is 70.

The spelling of 969609713721217 in words is "nine hundred sixty-nine trillion, six hundred nine billion, seven hundred thirteen million, seven hundred twenty-one thousand, two hundred seventeen".