6938905 has 4 divisors (see below), whose sum is σ = 8326692. Its totient is φ = 5551120.

The previous prime is 6938891. The next prime is 6938909. The reversal of 6938905 is 5098396.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1048576 + 5890329 = 1024^2 + 2427^2 .

It is not a de Polignac number, because 6938905 - 2⁷ = 6938777 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6938909) 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 3 ways as a sum of consecutive naturals, for example, 693886 + ... + 693895.

It is an arithmetic number, because the mean of its divisors is an integer number (2081673).

Almost surely, 2^6938905 is an apocalyptic number.

It is an amenable number.

6938905 is a deficient number, since it is larger than the sum of its proper divisors (1387787).

6938905 is a wasteful number, since it uses less digits than its factorization.

6938905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1387786.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 6938905 is about 2634.1801381075. The cubic root of 6938905 is about 190.7349649502.

The spelling of 6938905 in words is "six million, nine hundred thirty-eight thousand, nine hundred five".