2689949 has 4 divisors (see below), whose sum is σ = 2693436. Its totient is φ = 2686464.

The previous prime is 2689943. The next prime is 2689957. The reversal of 2689949 is 9499862.

2689949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1545049 + 1144900 = 1243^2 + 1070^2 .

It is a cyclic number.

It is not a de Polignac number, because 2689949 - 2²⁰ = 1641373 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 (2689943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14 + ... + 2319.

It is an arithmetic number, because the mean of its divisors is an integer number (673359).

2^2689949 is an apocalyptic number.

It is an amenable number.

2689949 is a deficient number, since it is larger than the sum of its proper divisors (3487).

2689949 is a wasteful number, since it uses less digits than its factorization.

2689949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3486.

The product of its digits is 279936, while the sum is 47.

The square root of 2689949 is about 1640.1063989876. The cubic root of 2689949 is about 139.0746627160.

The spelling of 2689949 in words is "two million, six hundred eighty-nine thousand, nine hundred forty-nine".