6945397 has 2 divisors, whose sum is σ = 6945398. Its totient is φ = 6945396.

The previous prime is 6945361. The next prime is 6945437. The reversal of 6945397 is 7935496.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5410276 + 1535121 = 2326^2 + 1239^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6945397 is a prime.

6945397 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6945347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3472698 + 3472699.

It is an arithmetic number, because the mean of its divisors is an integer number (3472699).

Almost surely, 2^6945397 is an apocalyptic number.

It is an amenable number.

6945397 is a deficient number, since it is larger than the sum of its proper divisors (1).

6945397 is an equidigital number, since it uses as much as digits as its factorization.

6945397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120, while the sum is 43.

The square root of 6945397 is about 2635.4121119855. The cubic root of 6945397 is about 190.7944299247.

Subtracting 6945397 from its reverse (7935496), we obtain a palindrome (990099).

The spelling of 6945397 in words is "six million, nine hundred forty-five thousand, three hundred ninety-seven".