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490209 = 3163403
BaseRepresentation
bin1110111101011100001
3220220102220
41313223201
5111141314
614301253
74111116
oct1675341
9826386
10490209
11305335
121b7829
13142185
14ca90d
159a3a9
hex77ae1

490209 has 4 divisors (see below), whose sum is σ = 653616. Its totient is φ = 326804.

The previous prime is 490207. The next prime is 490223. The reversal of 490209 is 902094.

490209 is nontrivially palindromic in base 15.

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 490209 - 21 = 490207 is a prime.

It is a D-number.

490209 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (490201) 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, 81699 + ... + 81704.

It is an arithmetic number, because the mean of its divisors is an integer number (163404).

2490209 is an apocalyptic number.

It is an amenable number.

490209 is a deficient number, since it is larger than the sum of its proper divisors (163407).

490209 is a wasteful number, since it uses less digits than its factorization.

490209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163406.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 490209 is about 700.1492697989. The cubic root of 490209 is about 78.8485588857.

The spelling of 490209 in words is "four hundred ninety thousand, two hundred nine".

Divisors: 1 3 163403 490209