343440421 has 8 divisors (see below), whose sum is σ = 351033984. Its totient is φ = 335858880.

The previous prime is 343440373. The next prime is 343440437. The reversal of 343440421 is 124044343.

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

It is a cyclic number.

It is not a de Polignac number, because 343440421 - 2⁹ = 343439909 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 (343440481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78861 + ... + 83101.

It is an arithmetic number, because the mean of its divisors is an integer number (43879248).

Almost surely, 2^343440421 is an apocalyptic number.

It is an amenable number.

343440421 is a deficient number, since it is larger than the sum of its proper divisors (7593563).

343440421 is a wasteful number, since it uses less digits than its factorization.

343440421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6011.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 343440421 is about 18532.1456124217. The cubic root of 343440421 is about 700.2994779798.

Adding to 343440421 its reverse (124044343), we get a palindrome (467484764).

The spelling of 343440421 in words is "three hundred forty-three million, four hundred forty thousand, four hundred twenty-one".