2681729 has 2 divisors, whose sum is σ = 2681730. Its totient is φ = 2681728.

The previous prime is 2681719. The next prime is 2681803. The reversal of 2681729 is 9271862.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1575025 + 1106704 = 1255^2 + 1052^2 .

It is a cyclic number.

It is not a de Polignac number, because 2681729 - 2⁴ = 2681713 is a prime.

It is a super-3 number, since 3×2681729³ = 57858333447223150467, which contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2681719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1340864 + 1340865.

It is an arithmetic number, because the mean of its divisors is an integer number (1340865).

2^2681729 is an apocalyptic number.

It is an amenable number.

2681729 is a deficient number, since it is larger than the sum of its proper divisors (1).

2681729 is an equidigital number, since it uses as much as digits as its factorization.

2681729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 35.

The square root of 2681729 is about 1637.5985466530. The cubic root of 2681729 is about 138.9328557929.

The spelling of 2681729 in words is "two million, six hundred eighty-one thousand, seven hundred twenty-nine".