342779 has 4 divisors (see below), whose sum is σ = 360840. Its totient is φ = 324720.

The previous prime is 342761. The next prime is 342791. The reversal of 342779 is 977243.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 342779 - 2¹² = 338683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (342799) 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 in 3 ways as a sum of consecutive naturals, for example, 9002 + ... + 9039.

It is an arithmetic number, because the mean of its divisors is an integer number (90210).

2³⁴²⁷⁷⁹ is an apocalyptic number.

342779 is a deficient number, since it is larger than the sum of its proper divisors (18061).

342779 is a wasteful number, since it uses less digits than its factorization.

342779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18060.

The product of its digits is 10584, while the sum is 32.

The square root of 342779 is about 585.4733127991. The cubic root of 342779 is about 69.9849627564.

The spelling of 342779 in words is "three hundred forty-two thousand, seven hundred seventy-nine".