343944985 has 4 divisors (see below), whose sum is σ = 412733988. Its totient is φ = 275155984.

The previous prime is 343944983. The next prime is 343944989. The reversal of 343944985 is 589449343.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 149426176 + 194518809 = 12224^2 + 13947^2 .

It is a cyclic number.

It is not a de Polignac number, because 343944985 - 2¹ = 343944983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (343944983) 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 3 ways as a sum of consecutive naturals, for example, 34394494 + ... + 34394503.

It is an arithmetic number, because the mean of its divisors is an integer number (103183497).

Almost surely, 2^343944985 is an apocalyptic number.

It is an amenable number.

343944985 is a deficient number, since it is larger than the sum of its proper divisors (68789003).

343944985 is an equidigital number, since it uses as much as digits as its factorization.

343944985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68789002.

The product of its digits is 1866240, while the sum is 49.

The square root of 343944985 is about 18545.7538266850. The cubic root of 343944985 is about 700.6422574805.

The spelling of 343944985 in words is "three hundred forty-three million, nine hundred forty-four thousand, nine hundred eighty-five".