343623209 has 4 divisors (see below), whose sum is σ = 344864004. Its totient is φ = 342382416.

The previous prime is 343623167. The next prime is 343623211. The reversal of 343623209 is 902326343.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 902326343 = 1163 ⋅775861.

It can be written as a sum of positive squares in 2 ways, for example, as 180499225 + 163123984 = 13435^2 + 12772^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-343623209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (343623239) 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, 619982 + ... + 620535.

It is an arithmetic number, because the mean of its divisors is an integer number (86216001).

Almost surely, 2^343623209 is an apocalyptic number.

It is an amenable number.

343623209 is a deficient number, since it is larger than the sum of its proper divisors (1240795).

343623209 is a wasteful number, since it uses less digits than its factorization.

343623209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240794.

The product of its (nonzero) digits is 23328, while the sum is 32.

The square root of 343623209 is about 18537.0766033914. The cubic root of 343623209 is about 700.4236951952.

The spelling of 343623209 in words is "three hundred forty-three million, six hundred twenty-three thousand, two hundred nine".