6381939 has 16 divisors (see below), whose sum is σ = 8858624. Its totient is φ = 4082400.

The previous prime is 6381913. The next prime is 6381941. The reversal of 6381939 is 9391836.

It is not a de Polignac number, because 6381939 - 2⁷ = 6381811 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6381897 and 6381906.

It is not an unprimeable number, because it can be changed into a prime (6381979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14949 + ... + 15369.

It is an arithmetic number, because the mean of its divisors is an integer number (553664).

Almost surely, 2^6381939 is an apocalyptic number.

6381939 is a deficient number, since it is larger than the sum of its proper divisors (2476685).

6381939 is a wasteful number, since it uses less digits than its factorization.

6381939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618.

The product of its digits is 34992, while the sum is 39.

The square root of 6381939 is about 2526.2499876299. The cubic root of 6381939 is about 185.4887393479.

The spelling of 6381939 in words is "six million, three hundred eighty-one thousand, nine hundred thirty-nine".