84028129 has 2 divisors, whose sum is σ = 84028130. Its totient is φ = 84028128.

The previous prime is 84028111. The next prime is 84028159. The reversal of 84028129 is 92182048.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83685904 + 342225 = 9148^2 + 585^2 .

It is a cyclic number.

It is not a de Polignac number, because 84028129 - 2¹³ = 84019937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 84028094 and 84028103.

It is not a weakly prime, because it can be changed into another prime (84028159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42014064 + 42014065.

It is an arithmetic number, because the mean of its divisors is an integer number (42014065).

Almost surely, 2^84028129 is an apocalyptic number.

It is an amenable number.

84028129 is a deficient number, since it is larger than the sum of its proper divisors (1).

84028129 is an equidigital number, since it uses as much as digits as its factorization.

84028129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 84028129 is about 9166.6858242224. The cubic root of 84028129 is about 438.0007940465. Note that the first 3 decimals are identical.

The spelling of 84028129 in words is "eighty-four million, twenty-eight thousand, one hundred twenty-nine".