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84104989 is a prime number
BaseRepresentation
bin1010000001101…
…01011100011101
312212020222100121
411000311130131
5133012324424
612202354541
72040611023
oct500653435
9185228317
1084104989
1143525361
12241bba51
1314569987
14b254713
1575b4ee4
hex503571d

84104989 has 2 divisors, whose sum is σ = 84104990. Its totient is φ = 84104988.

The previous prime is 84104983. The next prime is 84105029. The reversal of 84104989 is 98940148.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73102500 + 11002489 = 8550^2 + 3317^2 .

It is a cyclic number.

It is not a de Polignac number, because 84104989 - 25 = 84104957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84104983) 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, 42052494 + 42052495.

It is an arithmetic number, because the mean of its divisors is an integer number (42052495).

Almost surely, 284104989 is an apocalyptic number.

It is an amenable number.

84104989 is a deficient number, since it is larger than the sum of its proper divisors (1).

84104989 is an equidigital number, since it uses as much as digits as its factorization.

84104989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 84104989 is about 9170.8772208552. The cubic root of 84104989 is about 438.1342988714.

The spelling of 84104989 in words is "eighty-four million, one hundred four thousand, nine hundred eighty-nine".