345709 has 16 divisors (see below), whose sum is σ = 443520. Its totient is φ = 262080.

The previous prime is 345707. The next prime is 345727. The reversal of 345709 is 907543.

It is not a de Polignac number, because 345709 - 2¹ = 345707 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2574 + ... + 2704.

It is an arithmetic number, because the mean of its divisors is an integer number (27720).

2³⁴⁵⁷⁰⁹ is an apocalyptic number.

It is an amenable number.

345709 is a deficient number, since it is larger than the sum of its proper divisors (97811).

345709 is a wasteful number, since it uses less digits than its factorization.

345709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 345709 is about 587.9702373420. The cubic root of 345709 is about 70.1838026716.

The spelling of 345709 in words is "three hundred forty-five thousand, seven hundred nine".