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71268889 is a prime number
BaseRepresentation
bin1000011111101…
…11101000011001
311222002211112111
410033313220121
5121221101024
611023312321
71523530006
oct417675031
9158084474
1071268889
113725840a
121ba4b6a1
13119c4253
1496728ad
1563cba94
hex43f7a19

71268889 has 2 divisors, whose sum is σ = 71268890. Its totient is φ = 71268888.

The previous prime is 71268871. The next prime is 71268937. The reversal of 71268889 is 98886217.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66015625 + 5253264 = 8125^2 + 2292^2 .

It is a cyclic number.

It is not a de Polignac number, because 71268889 - 29 = 71268377 is a prime.

It is not a weakly prime, because it can be changed into another prime (71268839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35634444 + 35634445.

It is an arithmetic number, because the mean of its divisors is an integer number (35634445).

Almost surely, 271268889 is an apocalyptic number.

It is an amenable number.

71268889 is a deficient number, since it is larger than the sum of its proper divisors (1).

71268889 is an equidigital number, since it uses as much as digits as its factorization.

71268889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 387072, while the sum is 49.

The square root of 71268889 is about 8442.0903217154. The cubic root of 71268889 is about 414.6038489908.

The spelling of 71268889 in words is "seventy-one million, two hundred sixty-eight thousand, eight hundred eighty-nine".