12311389 has 2 divisors, whose sum is σ = 12311390. Its totient is φ = 12311388.

The previous prime is 12311347. The next prime is 12311401. The reversal of 12311389 is 98311321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8508889 + 3802500 = 2917^2 + 1950^2 .

It is a cyclic number.

It is not a de Polignac number, because 12311389 - 2⁷ = 12311261 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12311339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6155694 + 6155695.

It is an arithmetic number, because the mean of its divisors is an integer number (6155695).

Almost surely, 2^12311389 is an apocalyptic number.

It is an amenable number.

12311389 is a deficient number, since it is larger than the sum of its proper divisors (1).

12311389 is an equidigital number, since it uses as much as digits as its factorization.

12311389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 28.

The square root of 12311389 is about 3508.7588973881. The cubic root of 12311389 is about 230.9062480698.

The spelling of 12311389 in words is "twelve million, three hundred eleven thousand, three hundred eighty-nine".