12345667889 has 8 divisors (see below), whose sum is σ = 12410726592. Its totient is φ = 12280746960.

The previous prime is 12345667879. The next prime is 12345667907. The reversal of 12345667889 is 98876654321.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12345667889 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (12345667879) 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, 147767 + ... + 215699.

It is an arithmetic number, because the mean of its divisors is an integer number (1551340824).

Almost surely, 2^12345667889 is an apocalyptic number.

It is an amenable number.

12345667889 is a deficient number, since it is larger than the sum of its proper divisors (65058703).

12345667889 is an equidigital number, since it uses as much as digits as its factorization.

12345667889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68887.

The product of its digits is 17418240, while the sum is 59.

The spelling of 12345667889 in words is "twelve billion, three hundred forty-five million, six hundred sixty-seven thousand, eight hundred eighty-nine".