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523643009 is a prime number
BaseRepresentation
bin11111001101100…
…010100010000001
31100111022211011112
4133031202202001
52033023034014
6123543253105
715655615001
oct3715424201
91314284145
10523643009
1124964581a
1212744a195
1384642746
144d78c001
1530e8873e
hex1f362881

523643009 has 2 divisors, whose sum is σ = 523643010. Its totient is φ = 523643008.

The previous prime is 523642997. The next prime is 523643023. The reversal of 523643009 is 900346325.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 429649984 + 93993025 = 20728^2 + 9695^2 .

It is a cyclic number.

It is not a de Polignac number, because 523643009 - 28 = 523642753 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (523640009) 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 as a sum of consecutive naturals, namely, 261821504 + 261821505.

It is an arithmetic number, because the mean of its divisors is an integer number (261821505).

Almost surely, 2523643009 is an apocalyptic number.

It is an amenable number.

523643009 is a deficient number, since it is larger than the sum of its proper divisors (1).

523643009 is an equidigital number, since it uses as much as digits as its factorization.

523643009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 523643009 is about 22883.2473438540. The cubic root of 523643009 is about 806.0186731015.

The spelling of 523643009 in words is "five hundred twenty-three million, six hundred forty-three thousand, nine".