6909997 has 2 divisors, whose sum is σ = 6909998. Its totient is φ = 6909996.

The previous prime is 6909983. The next prime is 6910027. The reversal of 6909997 is 7999096.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3709476 + 3200521 = 1926^2 + 1789^2 .

It is a cyclic number.

It is not a de Polignac number, because 6909997 - 2¹¹ = 6907949 is a prime.

6909997 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6909997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6909907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3454998 + 3454999.

It is an arithmetic number, because the mean of its divisors is an integer number (3454999).

Almost surely, 2^6909997 is an apocalyptic number.

It is an amenable number.

6909997 is a deficient number, since it is larger than the sum of its proper divisors (1).

6909997 is an equidigital number, since it uses as much as digits as its factorization.

6909997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 275562, while the sum is 49.

The square root of 6909997 is about 2628.6873149920. The cubic root of 6909997 is about 190.4697242021.

It can be divided in two parts, 69099 and 97, that added together give a palindrome (69196).

The spelling of 6909997 in words is "six million, nine hundred nine thousand, nine hundred ninety-seven".