1716216779 has 2 divisors, whose sum is σ = 1716216780. Its totient is φ = 1716216778.

The previous prime is 1716216739. The next prime is 1716216809. The reversal of 1716216779 is 9776126171.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1716216779 is a prime.

It is a super-2 number, since 2×1716216779² = 5890800065042269682, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1716216709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 858108389 + 858108390.

It is an arithmetic number, because the mean of its divisors is an integer number (858108390).

Almost surely, 2^1716216779 is an apocalyptic number.

1716216779 is a deficient number, since it is larger than the sum of its proper divisors (1).

1716216779 is an equidigital number, since it uses as much as digits as its factorization.

1716216779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 222264, while the sum is 47.

The square root of 1716216779 is about 41427.2468189717. The cubic root of 1716216779 is about 1197.2661791288.

The spelling of 1716216779 in words is "one billion, seven hundred sixteen million, two hundred sixteen thousand, seven hundred seventy-nine".