6397947 has 24 divisors (see below), whose sum is σ = 9710064. Its totient is φ = 4209408.

The previous prime is 6397921. The next prime is 6397949. The reversal of 6397947 is 7497936.

6397947 is a `hidden beast` number, since 639 + 7 + 9 + 4 + 7 = 666.

It is not a de Polignac number, because 6397947 - 2⁸ = 6397691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6397949) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27343 + ... + 27575.

It is an arithmetic number, because the mean of its divisors is an integer number (404586).

Almost surely, 2^6397947 is an apocalyptic number.

6397947 is a deficient number, since it is larger than the sum of its proper divisors (3312117).

6397947 is a wasteful number, since it uses less digits than its factorization.

6397947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361 (or 349 counting only the distinct ones).

The product of its digits is 285768, while the sum is 45.

The square root of 6397947 is about 2529.4163358372. The cubic root of 6397947 is about 185.6436987591.

The spelling of 6397947 in words is "six million, three hundred ninety-seven thousand, nine hundred forty-seven".