13921047017 has 2 divisors, whose sum is σ = 13921047018. Its totient is φ = 13921047016.

The previous prime is 13921046957. The next prime is 13921047031. The reversal of 13921047017 is 71074012931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10109095936 + 3811951081 = 100544^2 + 61741^2 .

It is an emirp because it is prime and its reverse (71074012931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13921047017 - 2¹⁰ = 13921045993 is a prime.

It is not a weakly prime, because it can be changed into another prime (13921047047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6960523508 + 6960523509.

It is an arithmetic number, because the mean of its divisors is an integer number (6960523509).

Almost surely, 2^13921047017 is an apocalyptic number.

It is an amenable number.

13921047017 is a deficient number, since it is larger than the sum of its proper divisors (1).

13921047017 is an equidigital number, since it uses as much as digits as its factorization.

13921047017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 35.

Adding to 13921047017 its reverse (71074012931), we get a palindrome (84995059948).

The spelling of 13921047017 in words is "thirteen billion, nine hundred twenty-one million, forty-seven thousand, seventeen".