342129509 has 2 divisors, whose sum is σ = 342129510. Its totient is φ = 342129508.

The previous prime is 342129493. The next prime is 342129517. The reversal of 342129509 is 905921243.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 226502500 + 115627009 = 15050^2 + 10753^2 .

It is a cyclic number.

It is not a de Polignac number, because 342129509 - 2⁴ = 342129493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (342129589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171064754 + 171064755.

It is an arithmetic number, because the mean of its divisors is an integer number (171064755).

Almost surely, 2^342129509 is an apocalyptic number.

It is an amenable number.

342129509 is a deficient number, since it is larger than the sum of its proper divisors (1).

342129509 is an equidigital number, since it uses as much as digits as its factorization.

342129509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 342129509 is about 18496.7431998176. The cubic root of 342129509 is about 699.4073275925.

The spelling of 342129509 in words is "three hundred forty-two million, one hundred twenty-nine thousand, five hundred nine".