6442897 has 2 divisors, whose sum is σ = 6442898. Its totient is φ = 6442896.

The previous prime is 6442883. The next prime is 6442937. The reversal of 6442897 is 7982446.

It is an a-pointer prime, because the next prime (6442937) can be obtained adding 6442897 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5958481 + 484416 = 2441^2 + 696^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6442897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6442817) 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, 3221448 + 3221449.

It is an arithmetic number, because the mean of its divisors is an integer number (3221449).

Almost surely, 2^6442897 is an apocalyptic number.

It is an amenable number.

6442897 is a deficient number, since it is larger than the sum of its proper divisors (1).

6442897 is an equidigital number, since it uses as much as digits as its factorization.

6442897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 40.

The square root of 6442897 is about 2538.2862328745. The cubic root of 6442897 is about 186.0774429893.

The spelling of 6442897 in words is "six million, four hundred forty-two thousand, eight hundred ninety-seven".