2749689 has 6 divisors (see below), whose sum is σ = 3971786. Its totient is φ = 1833120.

The previous prime is 2749687. The next prime is 2749709. The reversal of 2749689 is 9869472.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2585664 + 164025 = 1608^2 + 405^2 .

It is not a de Polignac number, because 2749689 - 2¹ = 2749687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2749687) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 152752 + ... + 152769.

2^2749689 is an apocalyptic number.

It is an amenable number.

2749689 is a deficient number, since it is larger than the sum of its proper divisors (1222097).

2749689 is a wasteful number, since it uses less digits than its factorization.

2749689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305527 (or 305524 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 2749689 is about 1658.2186224983. The cubic root of 2749689 is about 140.0966849141.

The spelling of 2749689 in words is "two million, seven hundred forty-nine thousand, six hundred eighty-nine".