6938381 has 2 divisors, whose sum is σ = 6938382. Its totient is φ = 6938380.

The previous prime is 6938377. The next prime is 6938383. The reversal of 6938381 is 1838396.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6584356 + 354025 = 2566^2 + 595^2 .

It is a cyclic number.

It is not a de Polignac number, because 6938381 - 2² = 6938377 is a prime.

It is a super-2 number, since 2×6938381² = 96282261802322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 6938383, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6938383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3469190 + 3469191.

It is an arithmetic number, because the mean of its divisors is an integer number (3469191).

Almost surely, 2^6938381 is an apocalyptic number.

It is an amenable number.

6938381 is a deficient number, since it is larger than the sum of its proper divisors (1).

6938381 is an equidigital number, since it uses as much as digits as its factorization.

6938381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 38.

The square root of 6938381 is about 2634.0806745428. The cubic root of 6938381 is about 190.7301636337.

The spelling of 6938381 in words is "six million, nine hundred thirty-eight thousand, three hundred eighty-one".