353689 has 4 divisors (see below), whose sum is σ = 404224. Its totient is φ = 303156.

The previous prime is 353687. The next prime is 353699. The reversal of 353689 is 986353.

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, and also an emirpimes, since its reverse is a distinct semiprime: 986353 = 239 ⋅4127.

It is not a de Polignac number, because 353689 - 2¹ = 353687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (353681) 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, 25257 + ... + 25270.

It is an arithmetic number, because the mean of its divisors is an integer number (101056).

2³⁵³⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

353689 is a deficient number, since it is larger than the sum of its proper divisors (50535).

353689 is an equidigital number, since it uses as much as digits as its factorization.

353689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50534.

The product of its digits is 19440, while the sum is 34.

The square root of 353689 is about 594.7175800327. The cubic root of 353689 is about 70.7197175901.

The spelling of 353689 in words is "three hundred fifty-three thousand, six hundred eighty-nine".