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1985663 is a prime number
BaseRepresentation
bin111100100110001111111
310201212211002
413210301333
51002020123
6110320515
722610051
oct7446177
93655732
101985663
111136949
127b913b
13546a64
143998d1
15293528
hex1e4c7f

1985663 has 2 divisors, whose sum is σ = 1985664. Its totient is φ = 1985662.

The previous prime is 1985639. The next prime is 1985677. The reversal of 1985663 is 3665891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1985663 - 28 = 1985407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1985623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 992831 + 992832.

It is an arithmetic number, because the mean of its divisors is an integer number (992832).

21985663 is an apocalyptic number.

1985663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1985663 is an equidigital number, since it uses as much as digits as its factorization.

1985663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 38.

The square root of 1985663 is about 1409.1355506125. The cubic root of 1985663 is about 125.6903245975.

The spelling of 1985663 in words is "one million, nine hundred eighty-five thousand, six hundred sixty-three".