12434321987 has 8 divisors (see below), whose sum is σ = 12616974720. Its totient is φ = 12252623680.

The previous prime is 12434321947. The next prime is 12434321989. The reversal of 12434321987 is 78912343421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12434321987 - 2¹⁰ = 12434320963 is a prime.

It is a super-2 number, since 2×12434321987² (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 (12434321989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212339 + ... + 264492.

It is an arithmetic number, because the mean of its divisors is an integer number (1577121840).

Almost surely, 2^12434321987 is an apocalyptic number.

12434321987 is a deficient number, since it is larger than the sum of its proper divisors (182652733).

12434321987 is an equidigital number, since it uses as much as digits as its factorization.

12434321987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477213.

The product of its digits is 290304, while the sum is 44.

The spelling of 12434321987 in words is "twelve billion, four hundred thirty-four million, three hundred twenty-one thousand, nine hundred eighty-seven".