6389947 has 8 divisors (see below), whose sum is σ = 6958800. Its totient is φ = 5844384.

The previous prime is 6389941. The next prime is 6389953. The reversal of 6389947 is 7499836.

It is an interprime number because it is at equal distance from previous prime (6389941) and next prime (6389953).

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 6389947 - 2⁷ = 6389819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6389897 and 6389906.

It is not an unprimeable number, because it can be changed into a prime (6389941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5248 + ... + 6349.

It is an arithmetic number, because the mean of its divisors is an integer number (869850).

Almost surely, 2^6389947 is an apocalyptic number.

6389947 is a deficient number, since it is larger than the sum of its proper divisors (568853).

6389947 is a wasteful number, since it uses less digits than its factorization.

6389947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11645.

The product of its digits is 326592, while the sum is 46.

The square root of 6389947 is about 2527.8344486932. The cubic root of 6389947 is about 185.5662901242.

It can be divided in two parts, 638 and 9947, that added together give a triangular number (10585 = T₁₄₅).

The spelling of 6389947 in words is "six million, three hundred eighty-nine thousand, nine hundred forty-seven".