6938861 has 2 divisors, whose sum is σ = 6938862. Its totient is φ = 6938860.

The previous prime is 6938851. The next prime is 6938891. The reversal of 6938861 is 1688396.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6405961 + 532900 = 2531^2 + 730^2 .

It is a cyclic number.

It is not a de Polignac number, because 6938861 - 2⁶ = 6938797 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6938821) 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 as a sum of consecutive naturals, namely, 3469430 + 3469431.

It is an arithmetic number, because the mean of its divisors is an integer number (3469431).

Almost surely, 2^6938861 is an apocalyptic number.

It is an amenable number.

6938861 is a deficient number, since it is larger than the sum of its proper divisors (1).

6938861 is an equidigital number, since it uses as much as digits as its factorization.

6938861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 41.

The square root of 6938861 is about 2634.1717863496. The cubic root of 6938861 is about 190.7345617955.

The spelling of 6938861 in words is "six million, nine hundred thirty-eight thousand, eight hundred sixty-one".