17719660139 has 2 divisors, whose sum is σ = 17719660140. Its totient is φ = 17719660138.

The previous prime is 17719660103. The next prime is 17719660151. The reversal of 17719660139 is 93106691771.

It is a strong prime.

It is an emirp because it is prime and its reverse (93106691771) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 17719660139 - 2³² = 13424692843 is a prime.

It is not a weakly prime, because it can be changed into another prime (17719660339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8859830069 + 8859830070.

It is an arithmetic number, because the mean of its divisors is an integer number (8859830070).

Almost surely, 2^17719660139 is an apocalyptic number.

17719660139 is a deficient number, since it is larger than the sum of its proper divisors (1).

17719660139 is an equidigital number, since it uses as much as digits as its factorization.

17719660139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 428652, while the sum is 50.

The spelling of 17719660139 in words is "seventeen billion, seven hundred nineteen million, six hundred sixty thousand, one hundred thirty-nine".