619917920717 has 2 divisors, whose sum is σ = 619917920718. Its totient is φ = 619917920716.

The previous prime is 619917920681. The next prime is 619917920749. The reversal of 619917920717 is 717029719916.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 590724439396 + 29193481321 = 768586^2 + 170861^2 .

It is a cyclic number.

It is not a de Polignac number, because 619917920717 - 2¹⁰ = 619917919693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (619917920617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309958960358 + 309958960359.

It is an arithmetic number, because the mean of its divisors is an integer number (309958960359).

Almost surely, 2^619917920717 is an apocalyptic number.

It is an amenable number.

619917920717 is a deficient number, since it is larger than the sum of its proper divisors (1).

619917920717 is an equidigital number, since it uses as much as digits as its factorization.

619917920717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3000564, while the sum is 59.

The spelling of 619917920717 in words is "six hundred nineteen billion, nine hundred seventeen million, nine hundred twenty thousand, seven hundred seventeen".