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930218209 = 3124123609
BaseRepresentation
bin110111011100100…
…000000011100001
32101211100222111021
4313130200003201
53401113440314
6232145445441
732023503304
oct6734400341
92354328437
10930218209
114380a1788
1221b640881
1311a946a9b
148b784b3b
15569ea324
hex377200e1

930218209 has 12 divisors (see below), whose sum is σ = 984678660. Its totient is φ = 878217600.

The previous prime is 930218197. The next prime is 930218251. The reversal of 930218209 is 902812039.

It can be written as a sum of positive squares in 2 ways, for example, as 86490000 + 843728209 = 9300^2 + 29047^2 .

It is not a de Polignac number, because 930218209 - 29 = 930217697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (930218909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27597 + ... + 51205.

It is an arithmetic number, because the mean of its divisors is an integer number (82056555).

Almost surely, 2930218209 is an apocalyptic number.

It is an amenable number.

930218209 is a deficient number, since it is larger than the sum of its proper divisors (54460451).

930218209 is a wasteful number, since it uses less digits than its factorization.

930218209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23712 (or 23681 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 930218209 is about 30499.4788316128. The cubic root of 930218209 is about 976.1763435647.

The spelling of 930218209 in words is "nine hundred thirty million, two hundred eighteen thousand, two hundred nine".

Divisors: 1 31 41 961 1271 23609 39401 731879 967969 22688249 30007039 930218209