6387939 has 12 divisors (see below), whose sum is σ = 9476896. Its totient is φ = 4143312.

The previous prime is 6387919. The next prime is 6387949. The reversal of 6387939 is 9397836.

It is a happy number.

6387939 is a `hidden beast` number, since 638 + 7 + 9 + 3 + 9 = 666.

6387939 is nontrivially palindromic in base 6.

6387939 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6387939 - 2⁵ = 6387907 is a prime.

It is a Duffinian number.

6387939 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6387894 and 6387903.

It is not an unprimeable number, because it can be changed into a prime (6387919) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9259 + ... + 9924.

Almost surely, 2^6387939 is an apocalyptic number.

6387939 is a deficient number, since it is larger than the sum of its proper divisors (3088957).

6387939 is a wasteful number, since it uses less digits than its factorization.

6387939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19226 (or 19223 counting only the distinct ones).

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

The square root of 6387939 is about 2527.4372395769. The cubic root of 6387939 is about 185.5468504143.

The spelling of 6387939 in words is "six million, three hundred eighty-seven thousand, nine hundred thirty-nine".