344345821 has 4 divisors (see below), whose sum is σ = 344646144. Its totient is φ = 344045500.

The previous prime is 344345809. The next prime is 344345843. The reversal of 344345821 is 128543443.

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.

It is a cyclic number.

It is not a de Polignac number, because 344345821 - 2¹¹ = 344343773 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 (344345851) 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, 148435 + ... + 150736.

It is an arithmetic number, because the mean of its divisors is an integer number (86161536).

Almost surely, 2^344345821 is an apocalyptic number.

It is an amenable number.

344345821 is a deficient number, since it is larger than the sum of its proper divisors (300323).

344345821 is a wasteful number, since it uses less digits than its factorization.

344345821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300322.

The product of its digits is 46080, while the sum is 34.

The square root of 344345821 is about 18556.5573585188. The cubic root of 344345821 is about 700.9143296858.

The spelling of 344345821 in words is "three hundred forty-four million, three hundred forty-five thousand, eight hundred twenty-one".