12238729 has 2 divisors, whose sum is σ = 12238730. Its totient is φ = 12238728.

The previous prime is 12238661. The next prime is 12238741. The reversal of 12238729 is 92783221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7551504 + 4687225 = 2748^2 + 2165^2 .

It is a cyclic number.

It is not a de Polignac number, because 12238729 - 2⁹ = 12238217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12238694 and 12238703.

It is not a weakly prime, because it can be changed into another prime (12238799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6119364 + 6119365.

It is an arithmetic number, because the mean of its divisors is an integer number (6119365).

Almost surely, 2^12238729 is an apocalyptic number.

It is an amenable number.

12238729 is a deficient number, since it is larger than the sum of its proper divisors (1).

12238729 is an equidigital number, since it uses as much as digits as its factorization.

12238729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 34.

The square root of 12238729 is about 3498.3894866067. The cubic root of 12238729 is about 230.4510932795.

The spelling of 12238729 in words is "twelve million, two hundred thirty-eight thousand, seven hundred twenty-nine".