11471720017 has 2 divisors, whose sum is σ = 11471720018. Its totient is φ = 11471720016.

The previous prime is 11471720011. The next prime is 11471720021. The reversal of 11471720017 is 71002717411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8245366416 + 3226353601 = 90804^2 + 56801^2 .

It is an emirp because it is prime and its reverse (71002717411) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11471720017 is a prime.

It is not a weakly prime, because it can be changed into another prime (11471720011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5735860008 + 5735860009.

It is an arithmetic number, because the mean of its divisors is an integer number (5735860009).

Almost surely, 2^11471720017 is an apocalyptic number.

It is an amenable number.

11471720017 is a deficient number, since it is larger than the sum of its proper divisors (1).

11471720017 is an equidigital number, since it uses as much as digits as its factorization.

11471720017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2744, while the sum is 31.

The spelling of 11471720017 in words is "eleven billion, four hundred seventy-one million, seven hundred twenty thousand, seventeen".