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1680330161 is a prime number
BaseRepresentation
bin110010000100111…
…1100110110110001
311100002211121122102
41210021330312301
511420131031121
6434423150145
756432366516
oct14411746661
94302747572
101680330161
11792558a14
123aa8a5355
1320a180503
1411d24530d
159c7ba90b
hex6427cdb1

1680330161 has 2 divisors, whose sum is σ = 1680330162. Its totient is φ = 1680330160.

The previous prime is 1680330097. The next prime is 1680330163. The reversal of 1680330161 is 1610330861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 968454400 + 711875761 = 31120^2 + 26681^2 .

It is an emirp because it is prime and its reverse (1610330861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1680330161 - 26 = 1680330097 is a prime.

Together with 1680330163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1680330163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840165080 + 840165081.

It is an arithmetic number, because the mean of its divisors is an integer number (840165081).

Almost surely, 21680330161 is an apocalyptic number.

It is an amenable number.

1680330161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680330161 is an equidigital number, since it uses as much as digits as its factorization.

1680330161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 1680330161 is about 40991.8304177796. The cubic root of 1680330161 is about 1188.8622605000.

It can be divided in two parts, 16803 and 30161, that added together give a palindrome (46964).

The spelling of 1680330161 in words is "one billion, six hundred eighty million, three hundred thirty thousand, one hundred sixty-one".