7797997 has 2 divisors, whose sum is σ = 7797998. Its totient is φ = 7797996.

The previous prime is 7797991. The next prime is 7798069. The reversal of 7797997 is 7997977.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7241481 + 556516 = 2691^2 + 746^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7797997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7797991) 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, 3898998 + 3898999.

It is an arithmetic number, because the mean of its divisors is an integer number (3898999).

Almost surely, 2^7797997 is an apocalyptic number.

It is an amenable number.

7797997 is a deficient number, since it is larger than the sum of its proper divisors (1).

7797997 is an equidigital number, since it uses as much as digits as its factorization.

7797997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1750329, while the sum is 55.

The square root of 7797997 is about 2792.4893912063. The cubic root of 7797997 is about 198.3022710261.

The spelling of 7797997 in words is "seven million, seven hundred ninety-seven thousand, nine hundred ninety-seven".