353809 has 4 divisors (see below), whose sum is σ = 369216. Its totient is φ = 338404.

The previous prime is 353807. The next prime is 353813. The reversal of 353809 is 908353.

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 353809 - 2¹ = 353807 is a prime.

It is a Duffinian number.

353809 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (353807) 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, 7669 + ... + 7714.

It is an arithmetic number, because the mean of its divisors is an integer number (92304).

2³⁵³⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

353809 is a deficient number, since it is larger than the sum of its proper divisors (15407).

353809 is a wasteful number, since it uses less digits than its factorization.

353809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15406.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 353809 is about 594.8184597001. The cubic root of 353809 is about 70.7277146408.

It can be divided in two parts, 35 and 3809, that added together give a square (3844 = 62²).

The spelling of 353809 in words is "three hundred fifty-three thousand, eight hundred nine".