6387967 has 4 divisors (see below), whose sum is σ = 6399616. Its totient is φ = 6376320.

The previous prime is 6387961. The next prime is 6387977. The reversal of 6387967 is 7697836.

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 6387967 - 2¹⁹ = 5863679 is a prime.

It is a super-2 number, since 2×6387967² = 81612244786178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6387961) 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, 4959 + ... + 6112.

It is an arithmetic number, because the mean of its divisors is an integer number (1599904).

Almost surely, 2^6387967 is an apocalyptic number.

6387967 is a deficient number, since it is larger than the sum of its proper divisors (11649).

6387967 is a wasteful number, since it uses less digits than its factorization.

6387967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11648.

The product of its digits is 381024, while the sum is 46.

The square root of 6387967 is about 2527.4427787786. The cubic root of 6387967 is about 185.5471215139.

The spelling of 6387967 in words is "six million, three hundred eighty-seven thousand, nine hundred sixty-seven".