12231389 has 2 divisors, whose sum is σ = 12231390. Its totient is φ = 12231388.

The previous prime is 12231371. The next prime is 12231397. The reversal of 12231389 is 98313221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11764900 + 466489 = 3430^2 + 683^2 .

It is a cyclic number.

It is not a de Polignac number, because 12231389 - 2⁸ = 12231133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12231589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6115694 + 6115695.

It is an arithmetic number, because the mean of its divisors is an integer number (6115695).

Almost surely, 2^12231389 is an apocalyptic number.

It is an amenable number.

12231389 is a deficient number, since it is larger than the sum of its proper divisors (1).

12231389 is an equidigital number, since it uses as much as digits as its factorization.

12231389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 29.

The square root of 12231389 is about 3497.3402751234. The cubic root of 12231389 is about 230.4050141676.

The spelling of 12231389 in words is "twelve million, two hundred thirty-one thousand, three hundred eighty-nine".