17120719999 has 2 divisors, whose sum is σ = 17120720000. Its totient is φ = 17120719998.

The previous prime is 17120719969. The next prime is 17120720027. The reversal of 17120719999 is 99991702171.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 17120719999 - 2⁹ = 17120719487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17120719909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8560359999 + 8560360000.

It is an arithmetic number, because the mean of its divisors is an integer number (8560360000).

Almost surely, 2^17120719999 is an apocalyptic number.

17120719999 is a deficient number, since it is larger than the sum of its proper divisors (1).

17120719999 is an equidigital number, since it uses as much as digits as its factorization.

17120719999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 642978, while the sum is 55.

The spelling of 17120719999 in words is "seventeen billion, one hundred twenty million, seven hundred nineteen thousand, nine hundred ninety-nine".