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64808839 is a prime number
BaseRepresentation
bin1111011100111…
…0011110000111
311111221122000101
43313032132013
5113042340324
610233024531
71414603024
oct367163607
9144848011
1064808839
1133645927
1219855147
1310571a34
14887054b
155a52944
hex3dce787

64808839 has 2 divisors, whose sum is σ = 64808840. Its totient is φ = 64808838.

The previous prime is 64808833. The next prime is 64808921. The reversal of 64808839 is 93880846.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64808839 - 213 = 64800647 is a prime.

It is a super-2 number, since 2×648088392 = 8400371225055842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64808833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32404419 + 32404420.

It is an arithmetic number, because the mean of its divisors is an integer number (32404420).

Almost surely, 264808839 is an apocalyptic number.

64808839 is a deficient number, since it is larger than the sum of its proper divisors (1).

64808839 is an equidigital number, since it uses as much as digits as its factorization.

64808839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 331776, while the sum is 46.

The square root of 64808839 is about 8050.3937170799. The cubic root of 64808839 is about 401.6780319284.

The spelling of 64808839 in words is "sixty-four million, eight hundred eight thousand, eight hundred thirty-nine".