12141989 has 4 divisors (see below), whose sum is σ = 12341100. Its totient is φ = 11942880.

The previous prime is 12141979. The next prime is 12142001. The reversal of 12141989 is 98914121.

12141989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98914121 = 109 ⋅907469.

It can be written as a sum of positive squares in 2 ways, for example, as 6300100 + 5841889 = 2510^2 + 2417^2 .

It is a cyclic number.

It is not a de Polignac number, because 12141989 - 2⁴ = 12141973 is a prime.

It is a super-2 number, since 2×12141989² = 294855793752242, 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 (12141919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99464 + ... + 99585.

It is an arithmetic number, because the mean of its divisors is an integer number (3085275).

Almost surely, 2^12141989 is an apocalyptic number.

It is an amenable number.

12141989 is a deficient number, since it is larger than the sum of its proper divisors (199111).

12141989 is an equidigital number, since it uses as much as digits as its factorization.

12141989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199110.

The product of its digits is 5184, while the sum is 35.

The square root of 12141989 is about 3484.5356936040. The cubic root of 12141989 is about 229.8422926434.

The spelling of 12141989 in words is "twelve million, one hundred forty-one thousand, nine hundred eighty-nine".