12239528869 has 4 divisors (see below), whose sum is σ = 12242990880. Its totient is φ = 12236066860.

The previous prime is 12239528863. The next prime is 12239528891. The reversal of 12239528869 is 96882593221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12239528869 - 2⁵ = 12239528837 is a prime.

It is a super-2 number, since 2×12239528869² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12239528863) 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, 1725697 + ... + 1732774.

It is an arithmetic number, because the mean of its divisors is an integer number (3060747720).

Almost surely, 2^12239528869 is an apocalyptic number.

It is an amenable number.

12239528869 is a deficient number, since it is larger than the sum of its proper divisors (3462011).

12239528869 is an equidigital number, since it uses as much as digits as its factorization.

12239528869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3462010.

The product of its digits is 3732480, while the sum is 55.

The spelling of 12239528869 in words is "twelve billion, two hundred thirty-nine million, five hundred twenty-eight thousand, eight hundred sixty-nine".