6923681 has 2 divisors, whose sum is σ = 6923682. Its totient is φ = 6923680.

The previous prime is 6923677. The next prime is 6923687. The reversal of 6923681 is 1863296.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3534400 + 3389281 = 1880^2 + 1841^2 .

It is a cyclic number.

It is not a de Polignac number, because 6923681 - 2² = 6923677 is a prime.

It is a super-2 number, since 2×6923681² = 95874717179522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6923687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3461840 + 3461841.

It is an arithmetic number, because the mean of its divisors is an integer number (3461841).

Almost surely, 2^6923681 is an apocalyptic number.

It is an amenable number.

6923681 is a deficient number, since it is larger than the sum of its proper divisors (1).

6923681 is an equidigital number, since it uses as much as digits as its factorization.

6923681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 35.

The square root of 6923681 is about 2631.2888476942. The cubic root of 6923681 is about 190.5953715844.

The spelling of 6923681 in words is "six million, nine hundred twenty-three thousand, six hundred eighty-one".