6938881 has 4 divisors (see below), whose sum is σ = 7108164. Its totient is φ = 6769600.

The previous prime is 6938861. The next prime is 6938891. The reversal of 6938881 is 1888396.

It is a happy number.

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 1575025 + 5363856 = 1255^2 + 2316^2 .

It is a cyclic number.

It is not a de Polignac number, because 6938881 - 2⁵ = 6938849 is a prime.

It is a super-2 number, since 2×6938881² = 96296139064322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6938821) 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, 84580 + ... + 84661.

It is an arithmetic number, because the mean of its divisors is an integer number (1777041).

Almost surely, 2^6938881 is an apocalyptic number.

It is an amenable number.

6938881 is a deficient number, since it is larger than the sum of its proper divisors (169283).

6938881 is a wasteful number, since it uses less digits than its factorization.

6938881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169282.

The product of its digits is 82944, while the sum is 43.

The square root of 6938881 is about 2634.1755826064. The cubic root of 6938881 is about 190.7347450479.

It can be divided in two parts, 693888 and 1, that added together give a square (693889 = 833²).

The spelling of 6938881 in words is "six million, nine hundred thirty-eight thousand, eight hundred eighty-one".