84164609 has 2 divisors, whose sum is σ = 84164610. Its totient is φ = 84164608.

The previous prime is 84164593. The next prime is 84164627. The reversal of 84164609 is 90646148.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78712384 + 5452225 = 8872^2 + 2335^2 .

It is a cyclic number.

It is not a de Polignac number, because 84164609 - 2⁴ = 84164593 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84164629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42082304 + 42082305.

It is an arithmetic number, because the mean of its divisors is an integer number (42082305).

It is a Proth number, since it is equal to 5137 ⋅ 2¹⁴ + 1 and 5137 < 2¹⁴.

Almost surely, 2^84164609 is an apocalyptic number.

It is an amenable number.

84164609 is a deficient number, since it is larger than the sum of its proper divisors (1).

84164609 is an equidigital number, since it uses as much as digits as its factorization.

84164609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 84164609 is about 9174.1271519420. The cubic root of 84164609 is about 438.2378020338.

The spelling of 84164609 in words is "eighty-four million, one hundred sixty-four thousand, six hundred nine".