349609 has 4 divisors (see below), whose sum is σ = 376516. Its totient is φ = 322704.

The previous prime is 349603. The next prime is 349637. The reversal of 349609 is 906943.

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

It can be written as a sum of positive squares in 2 ways, for example, as 205209 + 144400 = 453^2 + 380^2 .

It is a cyclic number.

It is not a de Polignac number, because 349609 - 2¹¹ = 347561 is a prime.

It is a Duffinian number.

349609 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (349603) 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, 13434 + ... + 13459.

It is an arithmetic number, because the mean of its divisors is an integer number (94129).

2³⁴⁹⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

349609 is a deficient number, since it is larger than the sum of its proper divisors (26907).

349609 is a wasteful number, since it uses less digits than its factorization.

349609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26906.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 349609 is about 591.2774306533. The cubic root of 349609 is about 70.4467347441.

It can be divided in two parts, 34960 and 9, that added together give a square (34969 = 187²).

The spelling of 349609 in words is "three hundred forty-nine thousand, six hundred nine".