7997663 has 2 divisors, whose sum is σ = 7997664. Its totient is φ = 7997662.

The previous prime is 7997623. The next prime is 7997677. The reversal of 7997663 is 3667997.

It is a strong prime.

It is an emirp because it is prime and its reverse (3667997) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7997663 - 2²⁰ = 6949087 is a prime.

It is a super-2 number, since 2×7997663² = 127925226923138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7997623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3998831 + 3998832.

It is an arithmetic number, because the mean of its divisors is an integer number (3998832).

Almost surely, 2^7997663 is an apocalyptic number.

7997663 is a deficient number, since it is larger than the sum of its proper divisors (1).

7997663 is an equidigital number, since it uses as much as digits as its factorization.

7997663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 428652, while the sum is 47.

The square root of 7997663 is about 2828.0139674337. The cubic root of 7997663 is about 199.9805231033.

The spelling of 7997663 in words is "seven million, nine hundred ninety-seven thousand, six hundred sixty-three".