342689729 has 2 divisors, whose sum is σ = 342689730. Its totient is φ = 342689728.

The previous prime is 342689701. The next prime is 342689749. The reversal of 342689729 is 927986243.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 241647025 + 101042704 = 15545^2 + 10052^2 .

It is a cyclic number.

It is not a de Polignac number, because 342689729 - 2²⁴ = 325912513 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (342689749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171344864 + 171344865.

It is an arithmetic number, because the mean of its divisors is an integer number (171344865).

Almost surely, 2^342689729 is an apocalyptic number.

It is an amenable number.

342689729 is a deficient number, since it is larger than the sum of its proper divisors (1).

342689729 is an equidigital number, since it uses as much as digits as its factorization.

342689729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 50.

The square root of 342689729 is about 18511.8807526410. The cubic root of 342689729 is about 699.7888676177.

The spelling of 342689729 in words is "three hundred forty-two million, six hundred eighty-nine thousand, seven hundred twenty-nine".