344213809 has 3 divisors (see below), whose sum is σ = 344232363. Its totient is φ = 344195256.

The previous prime is 344213797. The next prime is 344213813. The reversal of 344213809 is 908312443.

The square root of 344213809 is 18553.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 22800625 + 321413184 = 4775^2 + 17928^2 .

It is a de Polignac number, because none of the positive numbers 2^k-344213809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (344213879) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 9277 + ... + 27829.

It is an arithmetic number, because the mean of its divisors is an integer number (114744121).

Almost surely, 2^344213809 is an apocalyptic number.

344213809 is the 18553-rd square number.

344213809 is the 9277-th centered octagonal number.

It is an amenable number.

344213809 is a deficient number, since it is larger than the sum of its proper divisors (18554).

344213809 is an frugal number, since it uses more digits than its factorization.

344213809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37106 (or 18553 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The cubic root of 344213809 is about 700.8247482983.

Multiplying 344213809 by its product of nonzero digits (20736), we get a square (7137617543424 = 2671632²).

The spelling of 344213809 in words is "three hundred forty-four million, two hundred thirteen thousand, eight hundred nine".