6463997 has 4 divisors (see below), whose sum is σ = 6483516. Its totient is φ = 6444480.

The previous prime is 6463991. The next prime is 6463999. The reversal of 6463997 is 7993646.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3345241 + 3118756 = 1829^2 + 1766^2 .

It is a cyclic number.

It is not a de Polignac number, because 6463997 - 2⁸ = 6463741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6463991) 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 3 ways as a sum of consecutive naturals, for example, 9254 + ... + 9927.

It is an arithmetic number, because the mean of its divisors is an integer number (1620879).

Almost surely, 2^6463997 is an apocalyptic number.

It is an amenable number.

6463997 is a deficient number, since it is larger than the sum of its proper divisors (19519).

6463997 is a wasteful number, since it uses less digits than its factorization.

6463997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19518.

The product of its digits is 244944, while the sum is 44.

The square root of 6463997 is about 2542.4391831468. The cubic root of 6463997 is about 186.2803514940.

The spelling of 6463997 in words is "six million, four hundred sixty-three thousand, nine hundred ninety-seven".