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86912281 is a prime number
BaseRepresentation
bin1010010111000…
…10110100011001
320001112121020101
411023202310121
5134222143111
612342455401
72103512401
oct513426431
9201477211
1086912281
1145072535
1225134561
13150106b1
14b785801
15796bbc1
hex52e2d19

86912281 has 2 divisors, whose sum is σ = 86912282. Its totient is φ = 86912280.

The previous prime is 86912261. The next prime is 86912299. The reversal of 86912281 is 18221968.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86118400 + 793881 = 9280^2 + 891^2 .

It is a cyclic number.

It is not a de Polignac number, because 86912281 - 25 = 86912249 is a prime.

It is a super-2 number, since 2×869122812 = 15107489177245922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 86912281.

It is not a weakly prime, because it can be changed into another prime (86912201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43456140 + 43456141.

It is an arithmetic number, because the mean of its divisors is an integer number (43456141).

Almost surely, 286912281 is an apocalyptic number.

It is an amenable number.

86912281 is a deficient number, since it is larger than the sum of its proper divisors (1).

86912281 is an equidigital number, since it uses as much as digits as its factorization.

86912281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 37.

The square root of 86912281 is about 9322.6756352455. The cubic root of 86912281 is about 442.9557898427.

The spelling of 86912281 in words is "eighty-six million, nine hundred twelve thousand, two hundred eighty-one".