6389647 has 6 divisors (see below), whose sum is σ = 7023464. Its totient is φ = 5808660.

The previous prime is 6389629. The next prime is 6389683. The reversal of 6389647 is 7469836.

It is a happy number.

It is not a de Polignac number, because 6389647 - 2⁷ = 6389519 is a prime.

It is a d-powerful number, because it can be written as 6⁶ + 3¹² + 8 + 9² + 6⁶ + 4 + 7⁸ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6389687) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26283 + ... + 26524.

Almost surely, 2^6389647 is an apocalyptic number.

6389647 is a deficient number, since it is larger than the sum of its proper divisors (633817).

6389647 is a wasteful number, since it uses less digits than its factorization.

6389647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52829 (or 52818 counting only the distinct ones).

The product of its digits is 217728, while the sum is 43.

The square root of 6389647 is about 2527.7751086677. The cubic root of 6389647 is about 185.5633860438.

It can be divided in two parts, 638 and 9647, that multiplied together give a triangular number (6154786 = T₃₅₀₈).

The spelling of 6389647 in words is "six million, three hundred eighty-nine thousand, six hundred forty-seven".