1223336729 has 2 divisors, whose sum is σ = 1223336730. Its totient is φ = 1223336728.

The previous prime is 1223336693. The next prime is 1223336731. The reversal of 1223336729 is 9276333221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1221362704 + 1974025 = 34948^2 + 1405^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223336729 - 2²⁰ = 1222288153 is a prime.

Together with 1223336731, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1223336692 and 1223336701.

It is not a weakly prime, because it can be changed into another prime (1223336749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611668364 + 611668365.

It is an arithmetic number, because the mean of its divisors is an integer number (611668365).

Almost surely, 2^1223336729 is an apocalyptic number.

It is an amenable number.

1223336729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223336729 is an equidigital number, since it uses as much as digits as its factorization.

1223336729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 38.

The square root of 1223336729 is about 34976.2309147226. The cubic root of 1223336729 is about 1069.5029947906.

The spelling of 1223336729 in words is "one billion, two hundred twenty-three million, three hundred thirty-six thousand, seven hundred twenty-nine".