16919867717 has 2 divisors, whose sum is σ = 16919867718. Its totient is φ = 16919867716.

The previous prime is 16919867689. The next prime is 16919867737. The reversal of 16919867717 is 71776891961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10952459716 + 5967408001 = 104654^2 + 77249^2 .

It is an emirp because it is prime and its reverse (71776891961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16919867717 - 2²² = 16915673413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16919867717.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16919867737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8459933858 + 8459933859.

It is an arithmetic number, because the mean of its divisors is an integer number (8459933859).

Almost surely, 2^16919867717 is an apocalyptic number.

It is an amenable number.

16919867717 is a deficient number, since it is larger than the sum of its proper divisors (1).

16919867717 is an equidigital number, since it uses as much as digits as its factorization.

16919867717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8001504, while the sum is 62.

The spelling of 16919867717 in words is "sixteen billion, nine hundred nineteen million, eight hundred sixty-seven thousand, seven hundred seventeen".