6305681 has 2 divisors, whose sum is σ = 6305682. Its totient is φ = 6305680.

The previous prime is 6305669. The next prime is 6305693. The reversal of 6305681 is 1865036.

It is a balanced prime because it is at equal distance from previous prime (6305669) and next prime (6305693).

It can be written as a sum of positive squares in only one way, i.e., 6225025 + 80656 = 2495^2 + 284^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6305681 is a prime.

It is a super-2 number, since 2×6305681² = 79523225747522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (6305081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3152840 + 3152841.

It is an arithmetic number, because the mean of its divisors is an integer number (3152841).

Almost surely, 2^6305681 is an apocalyptic number.

It is an amenable number.

6305681 is a deficient number, since it is larger than the sum of its proper divisors (1).

6305681 is an equidigital number, since it uses as much as digits as its factorization.

6305681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 6305681 is about 2511.1115068830. Note that the first 3 decimals coincide. The cubic root of 6305681 is about 184.7469733013.

The spelling of 6305681 in words is "six million, three hundred five thousand, six hundred eighty-one".