349869 has 8 divisors (see below), whose sum is σ = 502432. Its totient is φ = 215280.

The previous prime is 349849. The next prime is 349871. The reversal of 349869 is 968943.

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

It is not a de Polignac number, because 349869 - 2⁵ = 349837 is a prime.

It is a super-2 number, since 2×349869² = 244816634322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 8971 = 349869 / (3 + 4 + 9 + 8 + 6 + 9).

It is a Duffinian number.

It is a plaindrome in base 16.

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 (349819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4447 + ... + 4524.

It is an arithmetic number, because the mean of its divisors is an integer number (62804).

2³⁴⁹⁸⁶⁹ is an apocalyptic number.

349869 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

349869 is a deficient number, since it is larger than the sum of its proper divisors (152563).

349869 is a wasteful number, since it uses less digits than its factorization.

349869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8987.

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

The square root of 349869 is about 591.4972527409. The cubic root of 349869 is about 70.4641938793.

The spelling of 349869 in words is "three hundred forty-nine thousand, eight hundred sixty-nine".