2680681 has 2 divisors, whose sum is σ = 2680682. Its totient is φ = 2680680.

The previous prime is 2680661. The next prime is 2680693. The reversal of 2680681 is 1860862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2131600 + 549081 = 1460^2 + 741^2 .

It is a cyclic number.

It is not a de Polignac number, because 2680681 - 2⁷ = 2680553 is a prime.

It is a super-2 number, since 2×2680681² = 14372101247522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2680631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1340340 + 1340341.

It is an arithmetic number, because the mean of its divisors is an integer number (1340341).

2^2680681 is an apocalyptic number.

It is an amenable number.

2680681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2680681 is an equidigital number, since it uses as much as digits as its factorization.

2680681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 2680681 is about 1637.2785346422. The cubic root of 2680681 is about 138.9147554549.

The spelling of 2680681 in words is "two million, six hundred eighty thousand, six hundred eighty-one".