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84215069 is a prime number
BaseRepresentation
bin1010000010100…
…00010100011101
312212110120100122
411001100110131
5133024340234
612205004325
72041546661
oct501202435
9185416318
1084215069
11435a0034
12242536a5
13145a7b03
14b2828a1
1575d792e
hex505051d

84215069 has 2 divisors, whose sum is σ = 84215070. Its totient is φ = 84215068.

The previous prime is 84214993. The next prime is 84215081. The reversal of 84215069 is 96051248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71182969 + 13032100 = 8437^2 + 3610^2 .

It is a cyclic number.

It is not a de Polignac number, because 84215069 - 28 = 84214813 is a prime.

It is a super-2 number, since 2×842150692 = 14184355693349522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84215669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42107534 + 42107535.

It is an arithmetic number, because the mean of its divisors is an integer number (42107535).

Almost surely, 284215069 is an apocalyptic number.

It is an amenable number.

84215069 is a deficient number, since it is larger than the sum of its proper divisors (1).

84215069 is an equidigital number, since it uses as much as digits as its factorization.

84215069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 84215069 is about 9176.8768652521. The cubic root of 84215069 is about 438.3253648147.

The spelling of 84215069 in words is "eighty-four million, two hundred fifteen thousand, sixty-nine".