342720349 has 2 divisors, whose sum is σ = 342720350. Its totient is φ = 342720348.

The previous prime is 342720311. The next prime is 342720373. The reversal of 342720349 is 943027243.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 267551449 + 75168900 = 16357^2 + 8670^2 .

It is a cyclic number.

It is not a de Polignac number, because 342720349 - 2¹¹ = 342718301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (342727349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171360174 + 171360175.

It is an arithmetic number, because the mean of its divisors is an integer number (171360175).

Almost surely, 2^342720349 is an apocalyptic number.

It is an amenable number.

342720349 is a deficient number, since it is larger than the sum of its proper divisors (1).

342720349 is an equidigital number, since it uses as much as digits as its factorization.

342720349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 34.

The square root of 342720349 is about 18512.7077706099. The cubic root of 342720349 is about 699.8097094999.

The spelling of 342720349 in words is "three hundred forty-two million, seven hundred twenty thousand, three hundred forty-nine".