6997789 has 2 divisors, whose sum is σ = 6997790. Its totient is φ = 6997788.

The previous prime is 6997747. The next prime is 6997807. The reversal of 6997789 is 9877996.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6996025 + 1764 = 2645^2 + 42^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6997789 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6967789) 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, 3498894 + 3498895.

It is an arithmetic number, because the mean of its divisors is an integer number (3498895).

Almost surely, 2^6997789 is an apocalyptic number.

It is an amenable number.

6997789 is a deficient number, since it is larger than the sum of its proper divisors (1).

6997789 is an equidigital number, since it uses as much as digits as its factorization.

6997789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1714608, while the sum is 55.

The square root of 6997789 is about 2645.3334383401. Note that the first 3 decimals coincide. The cubic root of 6997789 is about 191.2729757238.

The spelling of 6997789 in words is "six million, nine hundred ninety-seven thousand, seven hundred eighty-nine".