343047021 has 8 divisors (see below), whose sum is σ = 460466400. Its totient is φ = 227162832.

The previous prime is 343047013. The next prime is 343047059. The reversal of 343047021 is 120740343.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 343047021 - 2³ = 343047013 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 343046982 and 343047000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343047121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 383275 + ... + 384168.

It is an arithmetic number, because the mean of its divisors is an integer number (57558300).

Almost surely, 2^343047021 is an apocalyptic number.

It is an amenable number.

343047021 is a deficient number, since it is larger than the sum of its proper divisors (117419379).

343047021 is a wasteful number, since it uses less digits than its factorization.

343047021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767595.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 343047021 is about 18521.5285816263. The cubic root of 343047021 is about 700.0319856133.

Adding to 343047021 its reverse (120740343), we get a palindrome (463787364).

The spelling of 343047021 in words is "three hundred forty-three million, forty-seven thousand, twenty-one".