342689 has 4 divisors (see below), whose sum is σ = 344256. Its totient is φ = 341124.

The previous prime is 342679. The next prime is 342691. The reversal of 342689 is 986243.

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, and also an emirpimes, since its reverse is a distinct semiprime: 986243 = 541 ⋅1823.

It is a cyclic number.

It is not a de Polignac number, because 342689 - 2⁴ = 342673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (342659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389 + ... + 914.

It is an arithmetic number, because the mean of its divisors is an integer number (86064).

2³⁴²⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

342689 is a deficient number, since it is larger than the sum of its proper divisors (1567).

342689 is a wasteful number, since it uses less digits than its factorization.

342689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1566.

The product of its digits is 10368, while the sum is 32.

The square root of 342689 is about 585.3964468631. The cubic root of 342689 is about 69.9788371400.

The spelling of 342689 in words is "three hundred forty-two thousand, six hundred eighty-nine".