343439999 has 4 divisors (see below), whose sum is σ = 392502864. Its totient is φ = 294377136.

The previous prime is 343439989. The next prime is 343440017. The reversal of 343439999 is 999934343.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 343439999 - 2⁴ = 343439983 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 343439999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343439909) 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, 24531422 + ... + 24531435.

It is an arithmetic number, because the mean of its divisors is an integer number (98125716).

Almost surely, 2^343439999 is an apocalyptic number.

343439999 is a deficient number, since it is larger than the sum of its proper divisors (49062865).

343439999 is an equidigital number, since it uses as much as digits as its factorization.

343439999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49062864.

The product of its digits is 2834352, while the sum is 53.

The square root of 343439999 is about 18532.1342267964. The cubic root of 343439999 is about 700.2991911503.

The spelling of 343439999 in words is "three hundred forty-three million, four hundred thirty-nine thousand, nine hundred ninety-nine".