6946781 has 2 divisors, whose sum is σ = 6946782. Its totient is φ = 6946780.

The previous prime is 6946769. The next prime is 6946783. The reversal of 6946781 is 1876496.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6421156 + 525625 = 2534^2 + 725^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6946781 is a prime.

It is a super-2 number, since 2×6946781² = 96515532523922, which contains 22 as substring.

Together with 6946783, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6946783) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3473390 + 3473391.

It is an arithmetic number, because the mean of its divisors is an integer number (3473391).

Almost surely, 2^6946781 is an apocalyptic number.

It is an amenable number.

6946781 is a deficient number, since it is larger than the sum of its proper divisors (1).

6946781 is an equidigital number, since it uses as much as digits as its factorization.

6946781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 41.

The square root of 6946781 is about 2635.6746764349. The cubic root of 6946781 is about 190.8071022002.

The spelling of 6946781 in words is "six million, nine hundred forty-six thousand, seven hundred eighty-one".