84534581 has 2 divisors, whose sum is σ = 84534582. Its totient is φ = 84534580.

The previous prime is 84534533. The next prime is 84534607. The reversal of 84534581 is 18543548.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53787556 + 30747025 = 7334^2 + 5545^2 .

It is a cyclic number.

It is not a de Polignac number, because 84534581 - 2²² = 80340277 is a prime.

It is a super-2 number, since 2×84534581² = 14292190769691122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84534521) 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, 42267290 + 42267291.

It is an arithmetic number, because the mean of its divisors is an integer number (42267291).

Almost surely, 2^84534581 is an apocalyptic number.

It is an amenable number.

84534581 is a deficient number, since it is larger than the sum of its proper divisors (1).

84534581 is an equidigital number, since it uses as much as digits as its factorization.

84534581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 76800, while the sum is 38.

The square root of 84534581 is about 9194.2689214532. The cubic root of 84534581 is about 438.8790007659.

The spelling of 84534581 in words is "eighty-four million, five hundred thirty-four thousand, five hundred eighty-one".