12784989 has 32 divisors (see below), whose sum is σ = 20643840. Its totient is φ = 6883200.

The previous prime is 12784951. The next prime is 12784991. The reversal of 12784989 is 98948721.

12784989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12784989 - 2¹¹ = 12782941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12784909) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26452 + ... + 26930.

It is an arithmetic number, because the mean of its divisors is an integer number (645120).

Almost surely, 2^12784989 is an apocalyptic number.

It is an amenable number.

12784989 is a deficient number, since it is larger than the sum of its proper divisors (7858851).

12784989 is a wasteful number, since it uses less digits than its factorization.

12784989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561.

The product of its digits is 290304, while the sum is 48.

The square root of 12784989 is about 3575.6102975576. The cubic root of 12784989 is about 233.8299407247.

The spelling of 12784989 in words is "twelve million, seven hundred eighty-four thousand, nine hundred eighty-nine".