84203129 has 2 divisors, whose sum is σ = 84203130. Its totient is φ = 84203128.

The previous prime is 84203123. The next prime is 84203131. The reversal of 84203129 is 92130248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45427600 + 38775529 = 6740^2 + 6227^2 .

It is a cyclic number.

It is not a de Polignac number, because 84203129 - 2⁴ = 84203113 is a prime.

Together with 84203131, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84203123) 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, 42101564 + 42101565.

It is an arithmetic number, because the mean of its divisors is an integer number (42101565).

Almost surely, 2^84203129 is an apocalyptic number.

It is an amenable number.

84203129 is a deficient number, since it is larger than the sum of its proper divisors (1).

84203129 is an equidigital number, since it uses as much as digits as its factorization.

84203129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 84203129 is about 9176.2262940710. The cubic root of 84203129 is about 438.3046486006.

The spelling of 84203129 in words is "eighty-four million, two hundred three thousand, one hundred twenty-nine".