7998268417 has 2 divisors, whose sum is σ = 7998268418. Its totient is φ = 7998268416.

The previous prime is 7998268391. The next prime is 7998268427. The reversal of 7998268417 is 7148628997.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7634565376 + 363703041 = 87376^2 + 19071^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7998268417 is a prime.

It is not a weakly prime, because it can be changed into another prime (7998268427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3999134208 + 3999134209.

It is an arithmetic number, because the mean of its divisors is an integer number (3999134209).

Almost surely, 2^7998268417 is an apocalyptic number.

It is an amenable number.

7998268417 is a deficient number, since it is larger than the sum of its proper divisors (1).

7998268417 is an equidigital number, since it uses as much as digits as its factorization.

7998268417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12192768, while the sum is 61.

The square root of 7998268417 is about 89433.0387328978. The cubic root of 7998268417 is about 1999.8556910044.

The spelling of 7998268417 in words is "seven billion, nine hundred ninety-eight million, two hundred sixty-eight thousand, four hundred seventeen".