6397866959 has 4 divisors (see below), whose sum is σ = 6979491240. Its totient is φ = 5816242680.

The previous prime is 6397866947. The next prime is 6397866961. The reversal of 6397866959 is 9596687936.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6397866959 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 (6397866259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290812124 + ... + 290812145.

It is an arithmetic number, because the mean of its divisors is an integer number (1744872810).

Almost surely, 2^6397866959 is an apocalyptic number.

6397866959 is a deficient number, since it is larger than the sum of its proper divisors (581624281).

6397866959 is a wasteful number, since it uses less digits than its factorization.

6397866959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581624280.

The product of its digits is 132269760, while the sum is 68.

The square root of 6397866959 is about 79986.6673827582. The cubic root of 6397866959 is about 1856.4292459572.

The spelling of 6397866959 in words is "six billion, three hundred ninety-seven million, eight hundred sixty-six thousand, nine hundred fifty-nine".