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63689 is a prime number
BaseRepresentation
bin1111100011001001
310020100212
433203021
54014224
61210505
7353453
oct174311
9106325
1063689
114393a
1230a35
1322cb2
14192d3
1513d0e
hexf8c9

63689 has 2 divisors, whose sum is σ = 63690. Its totient is φ = 63688.

The previous prime is 63671. The next prime is 63691. The reversal of 63689 is 98636.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55225 + 8464 = 235^2 + 92^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-63689 is a prime.

Together with 63691, 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 (63629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31844 + 31845.

It is an arithmetic number, because the mean of its divisors is an integer number (31845).

263689 is an apocalyptic number.

It is an amenable number.

63689 is a deficient number, since it is larger than the sum of its proper divisors (1).

63689 is an equidigital number, since it uses as much as digits as its factorization.

63689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 32.

The square root of 63689 is about 252.3667965482. The cubic root of 63689 is about 39.9351031001.

The spelling of 63689 in words is "sixty-three thousand, six hundred eighty-nine".