345439 has 4 divisors (see below), whose sum is σ = 363640. Its totient is φ = 327240.

The previous prime is 345431. The next prime is 345451. The reversal of 345439 is 934543.

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 345439 - 2³ = 345431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345431) 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, 9072 + ... + 9109.

It is an arithmetic number, because the mean of its divisors is an integer number (90910).

2³⁴⁵⁴³⁹ is an apocalyptic number.

345439 is a deficient number, since it is larger than the sum of its proper divisors (18201).

345439 is a wasteful number, since it uses less digits than its factorization.

345439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18200.

The product of its digits is 6480, while the sum is 28.

The square root of 345439 is about 587.7405890357. The cubic root of 345439 is about 70.1655266435.

It can be divided in two parts, 345 and 439, that added together give a square (784 = 28²).

The spelling of 345439 in words is "three hundred forty-five thousand, four hundred thirty-nine".