343211999 has 4 divisors (see below), whose sum is σ = 369612936. Its totient is φ = 316811064.

The previous prime is 343211993. The next prime is 343212007. The reversal of 343211999 is 999112343.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-343211999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343211993) 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, 13200449 + ... + 13200474.

It is an arithmetic number, because the mean of its divisors is an integer number (92403234).

Almost surely, 2^343211999 is an apocalyptic number.

343211999 is a deficient number, since it is larger than the sum of its proper divisors (26400937).

343211999 is a wasteful number, since it uses less digits than its factorization.

343211999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26400936.

The product of its digits is 52488, while the sum is 41.

The square root of 343211999 is about 18525.9817283727. The cubic root of 343211999 is about 700.1441873048.

The spelling of 343211999 in words is "three hundred forty-three million, two hundred eleven thousand, nine hundred ninety-nine".