12289382731 has 4 divisors (see below), whose sum is σ = 12685814464. Its totient is φ = 11892951000.

The previous prime is 12289382689. The next prime is 12289382737. The reversal of 12289382731 is 13728398221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12289382731 - 2¹¹ = 12289380683 is a prime.

It is a super-2 number, since 2×12289382731² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12289382737) 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, 198215820 + ... + 198215881.

It is an arithmetic number, because the mean of its divisors is an integer number (3171453616).

Almost surely, 2^12289382731 is an apocalyptic number.

12289382731 is a deficient number, since it is larger than the sum of its proper divisors (396431733).

12289382731 is an equidigital number, since it uses as much as digits as its factorization.

12289382731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396431732.

The product of its digits is 290304, while the sum is 46.

The spelling of 12289382731 in words is "twelve billion, two hundred eighty-nine million, three hundred eighty-two thousand, seven hundred thirty-one".