2543989 has 8 divisors (see below), whose sum is σ = 2922048. Its totient is φ = 2169600.

The previous prime is 2543971. The next prime is 2544011. The reversal of 2543989 is 9893452.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2543989 - 2¹¹ = 2541941 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 (2543939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 789 + ... + 2389.

It is an arithmetic number, because the mean of its divisors is an integer number (365256).

2^2543989 is an apocalyptic number.

It is an amenable number.

2543989 is a deficient number, since it is larger than the sum of its proper divisors (378059).

2543989 is a wasteful number, since it uses less digits than its factorization.

2543989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1835.

The product of its digits is 77760, while the sum is 40.

The square root of 2543989 is about 1594.9887146936. The cubic root of 2543989 is about 136.5122871754.

The spelling of 2543989 in words is "two million, five hundred forty-three thousand, nine hundred eighty-nine".