6381387 has 6 divisors (see below), whose sum is σ = 9217572. Its totient is φ = 4254252.

The previous prime is 6381379. The next prime is 6381407. The reversal of 6381387 is 7831836.

6381387 is a `hidden beast` number, since 638 + 13 + 8 + 7 = 666.

It is not a de Polignac number, because 6381387 - 2³ = 6381379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6381317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 354513 + ... + 354530.

It is an arithmetic number, because the mean of its divisors is an integer number (1536262).

Almost surely, 2^6381387 is an apocalyptic number.

6381387 is a deficient number, since it is larger than the sum of its proper divisors (2836185).

6381387 is a wasteful number, since it uses less digits than its factorization.

6381387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709049 (or 709046 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 6381387 is about 2526.1407324217. The cubic root of 6381387 is about 185.4833913005.

It can be divided in two parts, 638 and 1387, that added together give a square (2025 = 45²).

The spelling of 6381387 in words is "six million, three hundred eighty-one thousand, three hundred eighty-seven".