344356321 has 4 divisors (see below), whose sum is σ = 344402992. Its totient is φ = 344309652.

The previous prime is 344356303. The next prime is 344356333. The reversal of 344356321 is 123653443.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 123653443 = 557 ⋅221999.

It is a cyclic number.

It is not a de Polignac number, because 344356321 - 2⁷ = 344356193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (344356021) 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, 9555 + ... + 27928.

It is an arithmetic number, because the mean of its divisors is an integer number (86100748).

Almost surely, 2^344356321 is an apocalyptic number.

It is an amenable number.

344356321 is a deficient number, since it is larger than the sum of its proper divisors (46671).

344356321 is an equidigital number, since it uses as much as digits as its factorization.

344356321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46670.

The product of its digits is 25920, while the sum is 31.

The square root of 344356321 is about 18556.8402752193. The cubic root of 344356321 is about 700.9214538473.

The spelling of 344356321 in words is "three hundred forty-four million, three hundred fifty-six thousand, three hundred twenty-one".