6383987 has 4 divisors (see below), whose sum is σ = 6539736. Its totient is φ = 6228240.

The previous prime is 6383983. The next prime is 6383989. The reversal of 6383987 is 7893836.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6383987 - 2² = 6383983 is a prime.

It is a super-3 number, since 3×6383987³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6383983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77813 + ... + 77894.

It is an arithmetic number, because the mean of its divisors is an integer number (1634934).

Almost surely, 2^6383987 is an apocalyptic number.

6383987 is a deficient number, since it is larger than the sum of its proper divisors (155749).

6383987 is a wasteful number, since it uses less digits than its factorization.

6383987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155748.

The product of its digits is 217728, while the sum is 44.

The square root of 6383987 is about 2526.6552990070. The cubic root of 6383987 is about 185.5085786846.

The spelling of 6383987 in words is "six million, three hundred eighty-three thousand, nine hundred eighty-seven".