6397905 has 8 divisors (see below), whose sum is σ = 10236672. Its totient is φ = 3412208.

The previous prime is 6397903. The next prime is 6397921. The reversal of 6397905 is 5097936.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6397905 - 2¹ = 6397903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6397903) 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 in 7 ways as a sum of consecutive naturals, for example, 213249 + ... + 213278.

It is an arithmetic number, because the mean of its divisors is an integer number (1279584).

Almost surely, 2^6397905 is an apocalyptic number.

It is an amenable number.

6397905 is a deficient number, since it is larger than the sum of its proper divisors (3838767).

6397905 is a wasteful number, since it uses less digits than its factorization.

6397905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426535.

The product of its (nonzero) digits is 51030, while the sum is 39.

The square root of 6397905 is about 2529.4080335130. The cubic root of 6397905 is about 185.6432925323.

The spelling of 6397905 in words is "six million, three hundred ninety-seven thousand, nine hundred five".