342320729 has 2 divisors, whose sum is σ = 342320730. Its totient is φ = 342320728.

The previous prime is 342320723. The next prime is 342320747. The reversal of 342320729 is 927023243.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 297631504 + 44689225 = 17252^2 + 6685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-342320729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 342320695 and 342320704.

It is not a weakly prime, because it can be changed into another prime (342320723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171160364 + 171160365.

It is an arithmetic number, because the mean of its divisors is an integer number (171160365).

Almost surely, 2^342320729 is an apocalyptic number.

It is an amenable number.

342320729 is a deficient number, since it is larger than the sum of its proper divisors (1).

342320729 is an equidigital number, since it uses as much as digits as its factorization.

342320729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 342320729 is about 18501.9114958428. The cubic root of 342320729 is about 699.5376055107.

The spelling of 342320729 in words is "three hundred forty-two million, three hundred twenty thousand, seven hundred twenty-nine".