397943441717 has 2 divisors, whose sum is σ = 397943441718. Its totient is φ = 397943441716.

The previous prime is 397943441713. The next prime is 397943441737. The reversal of 397943441717 is 717144349793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 395539108561 + 2404333156 = 628919^2 + 49034^2 .

It is a cyclic number.

It is not a de Polignac number, because 397943441717 - 2² = 397943441713 is a prime.

It is a super-3 number, since 3×397943441717³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397943441713) 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, 198971720858 + 198971720859.

It is an arithmetic number, because the mean of its divisors is an integer number (198971720859).

Almost surely, 2^397943441717 is an apocalyptic number.

It is an amenable number.

397943441717 is a deficient number, since it is larger than the sum of its proper divisors (1).

397943441717 is an equidigital number, since it uses as much as digits as its factorization.

397943441717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16003008, while the sum is 59.

The spelling of 397943441717 in words is "three hundred ninety-seven billion, nine hundred forty-three million, four hundred forty-one thousand, seven hundred seventeen".