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8668993 is a prime number
BaseRepresentation
bin100001000100…
…011101000001
3121022102121211
4201010131001
54204401433
6505450121
7133454014
oct41043501
917272554
108668993
114991163
122aa0941
131a46aa8
14121937b
15b638cd
hex844741

8668993 has 2 divisors, whose sum is σ = 8668994. Its totient is φ = 8668992.

The previous prime is 8668973. The next prime is 8669027. The reversal of 8668993 is 3998668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8661249 + 7744 = 2943^2 + 88^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-8668993 is a prime.

8668993 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (8668973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4334496 + 4334497.

It is an arithmetic number, because the mean of its divisors is an integer number (4334497).

Almost surely, 28668993 is an apocalyptic number.

It is an amenable number.

8668993 is a deficient number, since it is larger than the sum of its proper divisors (1).

8668993 is an equidigital number, since it uses as much as digits as its factorization.

8668993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 49.

The square root of 8668993 is about 2944.3153703365. The cubic root of 8668993 is about 205.4263820304.

The spelling of 8668993 in words is "eight million, six hundred sixty-eight thousand, nine hundred ninety-three".