3984497077217 has 2 divisors, whose sum is σ = 3984497077218. Its totient is φ = 3984497077216.

The previous prime is 3984497077207. The next prime is 3984497077241. The reversal of 3984497077217 is 7127707944893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2822346240256 + 1162150836961 = 1679984^2 + 1078031^2 .

It is a cyclic number.

It is not a de Polignac number, because 3984497077217 - 2⁸ = 3984497076961 is a prime.

It is not a weakly prime, because it can be changed into another prime (3984497077207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1992248538608 + 1992248538609.

It is an arithmetic number, because the mean of its divisors is an integer number (1992248538609).

Almost surely, 2^{3984497077217} is an apocalyptic number.

It is an amenable number.

3984497077217 is a deficient number, since it is larger than the sum of its proper divisors (1).

3984497077217 is an equidigital number, since it uses as much as digits as its factorization.

3984497077217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 149361408, while the sum is 68.

The spelling of 3984497077217 in words is "three trillion, nine hundred eighty-four billion, four hundred ninety-seven million, seventy-seven thousand, two hundred seventeen".