2642989 has 4 divisors (see below), whose sum is σ = 2646460. Its totient is φ = 2639520.

The previous prime is 2642987. The next prime is 2642993. The reversal of 2642989 is 9892462.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9892462 = 2 ⋅4946231.

It can be written as a sum of positive squares in 2 ways, for example, as 887364 + 1755625 = 942^2 + 1325^2 .

It is a cyclic number.

It is not a de Polignac number, because 2642989 - 2¹ = 2642987 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 (2642987) 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, 42 + ... + 2299.

It is an arithmetic number, because the mean of its divisors is an integer number (661615).

2^2642989 is an apocalyptic number.

It is an amenable number.

2642989 is a deficient number, since it is larger than the sum of its proper divisors (3471).

2642989 is a wasteful number, since it uses less digits than its factorization.

2642989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3470.

The product of its digits is 62208, while the sum is 40.

The square root of 2642989 is about 1625.7272218918. The cubic root of 2642989 is about 138.2606046625.

The spelling of 2642989 in words is "two million, six hundred forty-two thousand, nine hundred eighty-nine".