617720430941 has 2 divisors, whose sum is σ = 617720430942. Its totient is φ = 617720430940.

The previous prime is 617720430881. The next prime is 617720430949. The reversal of 617720430941 is 149034027716.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 403517152900 + 214203278041 = 635230^2 + 462821^2 .

It is a cyclic number.

It is not a de Polignac number, because 617720430941 - 2³⁸ = 342842523997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 617720430892 and 617720430901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (617720430949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308860215470 + 308860215471.

It is an arithmetic number, because the mean of its divisors is an integer number (308860215471).

Almost surely, 2^617720430941 is an apocalyptic number.

It is an amenable number.

617720430941 is a deficient number, since it is larger than the sum of its proper divisors (1).

617720430941 is an equidigital number, since it uses as much as digits as its factorization.

617720430941 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 44.

The spelling of 617720430941 in words is "six hundred seventeen billion, seven hundred twenty million, four hundred thirty thousand, nine hundred forty-one".