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684385783 is a prime number
BaseRepresentation
bin101000110010101…
…110010111110111
31202200210101210121
4220302232113313
52400200321113
6151524432411
722650116554
oct5062562767
91680711717
10684385783
11321355194
12171248707
13aba33303
1466c71a2b
154013ae8d
hex28cae5f7

684385783 has 2 divisors, whose sum is σ = 684385784. Its totient is φ = 684385782.

The previous prime is 684385777. The next prime is 684385799. The reversal of 684385783 is 387583486.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 684385783 - 29 = 684385271 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 684385783.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (684385763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342192891 + 342192892.

It is an arithmetic number, because the mean of its divisors is an integer number (342192892).

Almost surely, 2684385783 is an apocalyptic number.

684385783 is a deficient number, since it is larger than the sum of its proper divisors (1).

684385783 is an equidigital number, since it uses as much as digits as its factorization.

684385783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3870720, while the sum is 52.

The square root of 684385783 is about 26160.7680124265. The cubic root of 684385783 is about 881.2524276847.

The spelling of 684385783 in words is "six hundred eighty-four million, three hundred eighty-five thousand, seven hundred eighty-three".