6749381 has 2 divisors, whose sum is σ = 6749382. Its totient is φ = 6749380.

The previous prime is 6749371. The next prime is 6749383. The reversal of 6749381 is 1839476.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6713281 + 36100 = 2591^2 + 190^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6749381 is a prime.

It is a super-2 number, since 2×6749381² = 91108287766322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 6749383, 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 (6749383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3374690 + 3374691.

It is an arithmetic number, because the mean of its divisors is an integer number (3374691).

Almost surely, 2^6749381 is an apocalyptic number.

It is an amenable number.

6749381 is a deficient number, since it is larger than the sum of its proper divisors (1).

6749381 is an equidigital number, since it uses as much as digits as its factorization.

6749381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 6749381 is about 2597.9570820166. The cubic root of 6749381 is about 188.9823803363.

The spelling of 6749381 in words is "six million, seven hundred forty-nine thousand, three hundred eighty-one".