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663863 = 6110883
BaseRepresentation
bin10100010000100110111
31020201122112
42202010313
5132220423
622121235
75433314
oct2420467
91221575
10663863
11413852
1228021b
131a3225
14133d0b
15d1a78
hexa2137

663863 has 4 divisors (see below), whose sum is σ = 674808. Its totient is φ = 652920.

The previous prime is 663857. The next prime is 663869. The reversal of 663863 is 368366.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (663857) and next prime (663869).

It is a cyclic number.

It is not a de Polignac number, because 663863 - 210 = 662839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5381 + ... + 5502.

It is an arithmetic number, because the mean of its divisors is an integer number (168702).

2663863 is an apocalyptic number.

663863 is a deficient number, since it is larger than the sum of its proper divisors (10945).

663863 is a wasteful number, since it uses less digits than its factorization.

663863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10944.

The product of its digits is 15552, while the sum is 32.

The square root of 663863 is about 814.7778838432. Note that the first 3 decimals coincide. The cubic root of 663863 is about 87.2354129794.

The spelling of 663863 in words is "six hundred sixty-three thousand, eight hundred sixty-three".

Divisors: 1 61 10883 663863