84566129 has 2 divisors, whose sum is σ = 84566130. Its totient is φ = 84566128.

The previous prime is 84566123. The next prime is 84566173. The reversal of 84566129 is 92166548.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51480625 + 33085504 = 7175^2 + 5752^2 .

It is a cyclic number.

It is not a de Polignac number, because 84566129 - 2²⁴ = 67788913 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (84566123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42283064 + 42283065.

It is an arithmetic number, because the mean of its divisors is an integer number (42283065).

Almost surely, 2^84566129 is an apocalyptic number.

It is an amenable number.

84566129 is a deficient number, since it is larger than the sum of its proper divisors (1).

84566129 is an equidigital number, since it uses as much as digits as its factorization.

84566129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 41.

The square root of 84566129 is about 9195.9843953761. The cubic root of 84566129 is about 438.9335899944.

The spelling of 84566129 in words is "eighty-four million, five hundred sixty-six thousand, one hundred twenty-nine".