343421003 has 4 divisors (see below), whose sum is σ = 343899360. Its totient is φ = 342942648.

The previous prime is 343420997. The next prime is 343421047. The reversal of 343421003 is 300124343.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 300124343 = 257 ⋅1167799.

It is a cyclic number.

It is not a de Polignac number, because 343421003 - 2¹² = 343416907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (343421053) 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, 238100 + ... + 239537.

It is an arithmetic number, because the mean of its divisors is an integer number (85974840).

Almost surely, 2^343421003 is an apocalyptic number.

343421003 is a deficient number, since it is larger than the sum of its proper divisors (478357).

343421003 is an equidigital number, since it uses as much as digits as its factorization.

343421003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478356.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 343421003 is about 18531.6217045352. The cubic root of 343421003 is about 700.2862795027.

Adding to 343421003 its reverse (300124343), we get a palindrome (643545346).

The spelling of 343421003 in words is "three hundred forty-three million, four hundred twenty-one thousand, three".