12289931 has 2 divisors, whose sum is σ = 12289932. Its totient is φ = 12289930.

The previous prime is 12289909. The next prime is 12289943. The reversal of 12289931 is 13998221.

It is a strong prime.

It is an emirp because it is prime and its reverse (13998221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12289931 - 2¹⁰ = 12288907 is a prime.

It is a super-4 number, since 4×12289931⁴ (a number of 29 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12289891 and 12289900.

It is not a weakly prime, because it can be changed into another prime (12289531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6144965 + 6144966.

It is an arithmetic number, because the mean of its divisors is an integer number (6144966).

Almost surely, 2^12289931 is an apocalyptic number.

12289931 is a deficient number, since it is larger than the sum of its proper divisors (1).

12289931 is an equidigital number, since it uses as much as digits as its factorization.

12289931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 35.

The square root of 12289931 is about 3505.6997874889. The cubic root of 12289931 is about 230.7720182199.

The spelling of 12289931 in words is "twelve million, two hundred eighty-nine thousand, nine hundred thirty-one".