12389879 has 2 divisors, whose sum is σ = 12389880. Its totient is φ = 12389878.

The previous prime is 12389833. The next prime is 12389903. The reversal of 12389879 is 97898321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12389879 - 2¹² = 12385783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12389579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6194939 + 6194940.

It is an arithmetic number, because the mean of its divisors is an integer number (6194940).

Almost surely, 2^12389879 is an apocalyptic number.

12389879 is a deficient number, since it is larger than the sum of its proper divisors (1).

12389879 is an equidigital number, since it uses as much as digits as its factorization.

12389879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 47.

The square root of 12389879 is about 3519.9259935402. The cubic root of 12389879 is about 231.3959153122.

The spelling of 12389879 in words is "twelve million, three hundred eighty-nine thousand, eight hundred seventy-nine".