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344809 = 499691
BaseRepresentation
bin1010100001011101001
3122111222201
41110023221
542013214
611220201
72634163
oct1241351
9574881
10344809
11216073
12147661
13c0c3a
148d933
156c274
hex542e9

344809 has 4 divisors (see below), whose sum is σ = 346000. Its totient is φ = 343620.

The previous prime is 344807. The next prime is 344819. The reversal of 344809 is 908443.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 908443 = 2293967.

It is a cyclic number.

It is not a de Polignac number, because 344809 - 21 = 344807 is a prime.

It is a Duffinian number.

344809 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (344801) 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, 154 + ... + 844.

It is an arithmetic number, because the mean of its divisors is an integer number (86500).

2344809 is an apocalyptic number.

It is an amenable number.

344809 is a deficient number, since it is larger than the sum of its proper divisors (1191).

344809 is an equidigital number, since it uses as much as digits as its factorization.

344809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 344809 is about 587.2043937165. The cubic root of 344809 is about 70.1228455124.

The spelling of 344809 in words is "three hundred forty-four thousand, eight hundred nine".

Divisors: 1 499 691 344809