3993534942497 has 2 divisors, whose sum is σ = 3993534942498. Its totient is φ = 3993534942496.

The previous prime is 3993534942413. The next prime is 3993534942503. The reversal of 3993534942497 is 7942494353993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3899357153041 + 94177789456 = 1974679^2 + 306884^2 .

It is an emirp because it is prime and its reverse (7942494353993) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3993534942497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3993534942497.

It is not a weakly prime, because it can be changed into another prime (3993534942697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1996767471248 + 1996767471249.

It is an arithmetic number, because the mean of its divisors is an integer number (1996767471249).

Almost surely, 2^{3993534942497} is an apocalyptic number.

It is an amenable number.

3993534942497 is a deficient number, since it is larger than the sum of its proper divisors (1).

3993534942497 is an equidigital number, since it uses as much as digits as its factorization.

3993534942497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 793618560, while the sum is 71.

The spelling of 3993534942497 in words is "three trillion, nine hundred ninety-three billion, five hundred thirty-four million, nine hundred forty-two thousand, four hundred ninety-seven".