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299209 = 5472
BaseRepresentation
bin1001001000011001001
3120012102211
41021003021
534033314
610225121
72354221
oct1110311
9505384
10299209
11194889
121251a1
13a6261
147b081
155d9c4
hex490c9

299209 has 3 divisors (see below), whose sum is σ = 299757. Its totient is φ = 298662.

The previous prime is 299197. The next prime is 299213. The reversal of 299209 is 902992.

The square root of 299209 is 547.

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 is not a de Polignac number, because 299209 - 211 = 297161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (299239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 274 + ... + 820.

It is an arithmetic number, because the mean of its divisors is an integer number (99919).

2299209 is an apocalyptic number.

299209 is the 547-th square number.

299209 is the 274-th centered octagonal number.

It is an amenable number.

299209 is a deficient number, since it is larger than the sum of its proper divisors (548).

299209 is an frugal number, since it uses more digits than its factorization.

299209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094 (or 547 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 31.

The cubic root of 299209 is about 66.8844075041.

Multiplying 299209 by its product of nonzero digits (2916), we get a square (872493444 = 295382).

It can be divided in two parts, 29920 and 9, that added together give a square (29929 = 1732).

The spelling of 299209 in words is "two hundred ninety-nine thousand, two hundred nine".

Divisors: 1 547 299209