12679989 has 32 divisors (see below), whose sum is σ = 20459520. Its totient is φ = 6831552.

The previous prime is 12679987. The next prime is 12679991. The reversal of 12679989 is 98997621.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12679987) and next prime (12679991).

It is not a de Polignac number, because 12679989 - 2¹ = 12679987 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12679987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28402 + ... + 28844.

It is an arithmetic number, because the mean of its divisors is an integer number (639360).

Almost surely, 2^12679989 is an apocalyptic number.

It is an amenable number.

12679989 is a deficient number, since it is larger than the sum of its proper divisors (7779531).

12679989 is a wasteful number, since it uses less digits than its factorization.

12679989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529.

The product of its digits is 489888, while the sum is 51.

The square root of 12679989 is about 3560.8972183988. The cubic root of 12679989 is about 233.1880508300.

The spelling of 12679989 in words is "twelve million, six hundred seventy-nine thousand, nine hundred eighty-nine".