2730689 has 4 divisors (see below), whose sum is σ = 2940756. Its totient is φ = 2520624.

The previous prime is 2730683. The next prime is 2730691. The reversal of 2730689 is 9860372.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1795600 + 935089 = 1340^2 + 967^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2730689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2730683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105014 + ... + 105039.

It is an arithmetic number, because the mean of its divisors is an integer number (735189).

2^2730689 is an apocalyptic number.

It is an amenable number.

2730689 is a deficient number, since it is larger than the sum of its proper divisors (210067).

2730689 is a wasteful number, since it uses less digits than its factorization.

2730689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210066.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 2730689 is about 1652.4796519171. The cubic root of 2730689 is about 139.7732554107.

The spelling of 2730689 in words is "two million, seven hundred thirty thousand, six hundred eighty-nine".