6389739 has 16 divisors (see below), whose sum is σ = 10023840. Its totient is φ = 4008960.

The previous prime is 6389737. The next prime is 6389741. The reversal of 6389739 is 9379836.

It is a happy number.

6389739 is a `hidden beast` number, since 638 + 9 + 7 + 3 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (6389737) and next prime (6389741).

It is not a de Polignac number, because 6389739 - 2¹ = 6389737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6389694 and 6389703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6389731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6502 + ... + 7419.

It is an arithmetic number, because the mean of its divisors is an integer number (626490).

Almost surely, 2^6389739 is an apocalyptic number.

6389739 is a deficient number, since it is larger than the sum of its proper divisors (3634101).

6389739 is a wasteful number, since it uses less digits than its factorization.

6389739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13947 (or 13941 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 6389739 is about 2527.7933064236. The cubic root of 6389739 is about 185.5642766381.

It can be divided in two parts, 63897 and 39, that added together give a palindrome (63936).

The spelling of 6389739 in words is "six million, three hundred eighty-nine thousand, seven hundred thirty-nine".