2681647 has 4 divisors (see below), whose sum is σ = 2714040. Its totient is φ = 2649256.

The previous prime is 2681617. The next prime is 2681663. The reversal of 2681647 is 7461862.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2681647 - 2¹⁵ = 2648879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2681617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16072 + ... + 16237.

It is an arithmetic number, because the mean of its divisors is an integer number (678510).

2^2681647 is an apocalyptic number.

2681647 is a deficient number, since it is larger than the sum of its proper divisors (32393).

2681647 is an equidigital number, since it uses as much as digits as its factorization.

2681647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32392.

The product of its digits is 16128, while the sum is 34.

The square root of 2681647 is about 1637.5735098004. The cubic root of 2681647 is about 138.9314397151.

The spelling of 2681647 in words is "two million, six hundred eighty-one thousand, six hundred forty-seven".