16717009979 has 2 divisors, whose sum is σ = 16717009980. Its totient is φ = 16717009978.

The previous prime is 16717009949. The next prime is 16717010017. The reversal of 16717009979 is 97990071761.

It is a weak prime.

It is an emirp because it is prime and its reverse (97990071761) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16717009979 is a prime.

It is not a weakly prime, because it can be changed into another prime (16717009949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8358504989 + 8358504990.

It is an arithmetic number, because the mean of its divisors is an integer number (8358504990).

Almost surely, 2^16717009979 is an apocalyptic number.

16717009979 is a deficient number, since it is larger than the sum of its proper divisors (1).

16717009979 is an equidigital number, since it uses as much as digits as its factorization.

16717009979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1500282, while the sum is 56.

The spelling of 16717009979 in words is "sixteen billion, seven hundred seventeen million, nine thousand, nine hundred seventy-nine".