343405803 has 18 divisors (see below), whose sum is σ = 496407996. Its totient is φ = 211069872.

The previous prime is 343405787. The next prime is 343405819. The reversal of 343405803 is 308504343.

It is an interprime number because it is at equal distance from previous prime (343405787) and next prime (343405819).

It is not a de Polignac number, because 343405803 - 2⁴ = 343405787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (343405883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 416850 + ... + 417672.

It is an arithmetic number, because the mean of its divisors is an integer number (27578222).

Almost surely, 2^343405803 is an apocalyptic number.

343405803 is a deficient number, since it is larger than the sum of its proper divisors (153002193).

343405803 is an frugal number, since it uses more digits than its factorization.

343405803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1675 (or 839 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 343405803 is about 18531.2115901794. The cubic root of 343405803 is about 700.2759476667.

The spelling of 343405803 in words is "three hundred forty-three million, four hundred five thousand, eight hundred three".