12763989 has 24 divisors (see below), whose sum is σ = 21333312. Its totient is φ = 7202880.

The previous prime is 12763967. The next prime is 12763999. The reversal of 12763989 is 98936721.

12763989 is a `hidden beast` number, since 1 + 2 + 7 + 639 + 8 + 9 = 666.

It is not a de Polignac number, because 12763989 - 2¹² = 12759893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12763999) 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 23 ways as a sum of consecutive naturals, for example, 4009 + ... + 6449.

It is an arithmetic number, because the mean of its divisors is an integer number (888888).

Almost surely, 2^12763989 is an apocalyptic number.

It is an amenable number.

12763989 is a deficient number, since it is larger than the sum of its proper divisors (8569323).

12763989 is a wasteful number, since it uses less digits than its factorization.

12763989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2537 (or 2534 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 12763989 is about 3572.6725290740. The cubic root of 12763989 is about 233.7018446751.

The spelling of 12763989 in words is "twelve million, seven hundred sixty-three thousand, nine hundred eighty-nine".