349689 has 8 divisors (see below), whose sum is σ = 477792. Its totient is φ = 227360.

The previous prime is 349667. The next prime is 349697. The reversal of 349689 is 986943.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 349689 - 2⁹ = 349177 is a prime.

It is a Curzon number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (349589) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1299 + ... + 1544.

It is an arithmetic number, because the mean of its divisors is an integer number (59724).

2³⁴⁹⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

349689 is a deficient number, since it is larger than the sum of its proper divisors (128103).

349689 is a wasteful number, since it uses less digits than its factorization.

349689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2887.

The product of its digits is 46656, while the sum is 39.

The square root of 349689 is about 591.3450769221. The cubic root of 349689 is about 70.4521077074.

The spelling of 349689 in words is "three hundred forty-nine thousand, six hundred eighty-nine".