353309 has 4 divisors (see below), whose sum is σ = 385440. Its totient is φ = 321180.

The previous prime is 353293. The next prime is 353317. The reversal of 353309 is 903353.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 353309 - 2⁴ = 353293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (353329) 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, 16049 + ... + 16070.

It is an arithmetic number, because the mean of its divisors is an integer number (96360).

2³⁵³³⁰⁹ is an apocalyptic number.

It is an amenable number.

353309 is a deficient number, since it is larger than the sum of its proper divisors (32131).

353309 is a wasteful number, since it uses less digits than its factorization.

353309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32130.

The product of its (nonzero) digits is 1215, while the sum is 23.

The square root of 353309 is about 594.3980148015. The cubic root of 353309 is about 70.6943816569.

The spelling of 353309 in words is "three hundred fifty-three thousand, three hundred nine".