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68668873 = 7136131231
BaseRepresentation
bin1000001011111…
…00110111001001
311210012201222121
410011330313021
5120034400443
610451451241
71462450540
oct405746711
9153181877
1068668873
1135841a39
121abb6b21
13112c3990
149197157
1560664ed
hex417cdc9

68668873 has 16 divisors (see below), whose sum is σ = 84722176. Its totient is φ = 54198720.

The previous prime is 68668841. The next prime is 68668877. The reversal of 68668873 is 37886686.

It is a cyclic number.

It is not a de Polignac number, because 68668873 - 25 = 68668841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68668873.

It is not an unprimeable number, because it can be changed into a prime (68668877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55168 + ... + 56398.

It is an arithmetic number, because the mean of its divisors is an integer number (5295136).

Almost surely, 268668873 is an apocalyptic number.

It is an amenable number.

68668873 is a deficient number, since it is larger than the sum of its proper divisors (16053303).

68668873 is a wasteful number, since it uses less digits than its factorization.

68668873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1864.

The product of its digits is 2322432, while the sum is 52.

The square root of 68668873 is about 8286.6683896485. The cubic root of 68668873 is about 409.4994347209.

The spelling of 68668873 in words is "sixty-eight million, six hundred sixty-eight thousand, eight hundred seventy-three".

Divisors: 1 7 13 91 613 1231 4291 7969 8617 16003 55783 112021 754603 5282221 9809839 68668873