12036989 has 4 divisors (see below), whose sum is σ = 12264156. Its totient is φ = 11809824.

The previous prime is 12036977. The next prime is 12036991. The reversal of 12036989 is 98963021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98963021 = 191 ⋅518131.

It can be written as a sum of positive squares in 2 ways, for example, as 8265625 + 3771364 = 2875^2 + 1942^2 .

It is a cyclic number.

It is not a de Polignac number, because 12036989 - 2²⁰ = 10988413 is a prime.

It is a super-2 number, since 2×12036989² = 289778208372242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12036919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113504 + ... + 113609.

It is an arithmetic number, because the mean of its divisors is an integer number (3066039).

Almost surely, 2^12036989 is an apocalyptic number.

It is an amenable number.

12036989 is a deficient number, since it is larger than the sum of its proper divisors (227167).

12036989 is an equidigital number, since it uses as much as digits as its factorization.

12036989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227166.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 12036989 is about 3469.4364095628. The cubic root of 12036989 is about 229.1778396463.

It can be divided in two parts, 1203 and 6989, that added together give a 13-th power (8192 = 2¹³).

The spelling of 12036989 in words is "twelve million, thirty-six thousand, nine hundred eighty-nine".