6339987 has 24 divisors (see below), whose sum is σ = 9563840. Its totient is φ = 4043520.

The previous prime is 6339947. The next prime is 6339989. The reversal of 6339987 is 7899336.

It is a happy number.

6339987 is a `hidden beast` number, since 633 + 9 + 9 + 8 + 7 = 666.

6339987 is digitally balanced in base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6339987 - 2¹⁰ = 6338963 is a prime.

It is a Duffinian number.

6339987 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6339989) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26187 + ... + 26427.

Almost surely, 2^6339987 is an apocalyptic number.

6339987 is a deficient number, since it is larger than the sum of its proper divisors (3223853).

6339987 is a wasteful number, since it uses less digits than its factorization.

6339987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363 (or 360 counting only the distinct ones).

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

The square root of 6339987 is about 2517.9330809217. The cubic root of 6339987 is about 185.0814056152.

The spelling of 6339987 in words is "six million, three hundred thirty-nine thousand, nine hundred eighty-seven".