342217729 has 4 divisors (see below), whose sum is σ = 391105984. Its totient is φ = 293329476.

The previous prime is 342217723. The next prime is 342217741. The reversal of 342217729 is 927712243.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 342217729 - 2⁵ = 342217697 is a prime.

It is a super-2 number, since 2×342217729² = 234225948083834882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (342217723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24444117 + ... + 24444130.

It is an arithmetic number, because the mean of its divisors is an integer number (97776496).

Almost surely, 2^342217729 is an apocalyptic number.

It is an amenable number.

342217729 is a deficient number, since it is larger than the sum of its proper divisors (48888255).

342217729 is an equidigital number, since it uses as much as digits as its factorization.

342217729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48888254.

The product of its digits is 42336, while the sum is 37.

The square root of 342217729 is about 18499.1277902500. The cubic root of 342217729 is about 699.4674377849.

The spelling of 342217729 in words is "three hundred forty-two million, two hundred seventeen thousand, seven hundred twenty-nine".