343989 has 12 divisors (see below), whose sum is σ = 510796. Its totient is φ = 222912.

The previous prime is 343963. The next prime is 343997. The reversal of 343989 is 989343.

It can be written as a sum of positive squares in 2 ways, for example, as 321489 + 22500 = 567^2 + 150^2 .

It is not a de Polignac number, because 343989 - 2¹⁷ = 212917 is a prime.

It is an Ulam number.

It is a Duffinian number.

343989 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 343989.

It is not an unprimeable number, because it can be changed into a prime (343939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 184 + ... + 849.

2³⁴³⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

343989 is a deficient number, since it is larger than the sum of its proper divisors (166807).

343989 is a wasteful number, since it uses less digits than its factorization.

343989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076 (or 1073 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 343989 is about 586.5057544475. The cubic root of 343989 is about 70.0672143514.

The spelling of 343989 in words is "three hundred forty-three thousand, nine hundred eighty-nine".