12423889 has 8 divisors (see below), whose sum is σ = 13403880. Its totient is φ = 11471616.

The previous prime is 12423869. The next prime is 12423893. The reversal of 12423889 is 98832421.

It can be written as a sum of positive squares in 4 ways, for example, as 8363664 + 4060225 = 2892^2 + 2015^2 .

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 12423889 - 2⁹ = 12423377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12423869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5994 + ... + 7795.

It is an arithmetic number, because the mean of its divisors is an integer number (1675485).

Almost surely, 2^12423889 is an apocalyptic number.

It is an amenable number.

12423889 is a deficient number, since it is larger than the sum of its proper divisors (979991).

12423889 is a wasteful number, since it uses less digits than its factorization.

12423889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13859.

The product of its digits is 27648, while the sum is 37.

The square root of 12423889 is about 3524.7537502640. The cubic root of 12423889 is about 231.6074477854.

The spelling of 12423889 in words is "twelve million, four hundred twenty-three thousand, eight hundred eighty-nine".