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1690009 is a prime number
BaseRepresentation
bin110011100100110011001
310011212020221
412130212121
5413040014
6100120041
720236066
oct6344631
93155227
101690009
11a54802
12696021
13472309
1431dc6d
15235b24
hex19c999

1690009 has 2 divisors, whose sum is σ = 1690010. Its totient is φ = 1690008.

The previous prime is 1689967. The next prime is 1690019. The reversal of 1690009 is 9000961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1690000 + 9 = 1300^2 + 3^2 .

It is an emirp because it is prime and its reverse (9000961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1690009 - 27 = 1689881 is a prime.

It is a super-2 number, since 2×16900092 = 5712260840162, which contains 22 as substring.

It is equal to p127429 and since 1690009 and 127429 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (1690019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 845004 + 845005.

It is an arithmetic number, because the mean of its divisors is an integer number (845005).

21690009 is an apocalyptic number.

It is an amenable number.

1690009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1690009 is an equidigital number, since it uses as much as digits as its factorization.

1690009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 1690009 is about 1300.0034615339. The cubic root of 1690009 is about 119.1140539640.

The spelling of 1690009 in words is "one million, six hundred ninety thousand, nine".