84129211 has 2 divisors, whose sum is σ = 84129212. Its totient is φ = 84129210.

The previous prime is 84129181. The next prime is 84129217. The reversal of 84129211 is 11292148.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84129211 - 2²¹ = 82032059 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84129211.

It is not a weakly prime, because it can be changed into another prime (84129217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42064605 + 42064606.

It is an arithmetic number, because the mean of its divisors is an integer number (42064606).

Almost surely, 2^84129211 is an apocalyptic number.

84129211 is a deficient number, since it is larger than the sum of its proper divisors (1).

84129211 is an equidigital number, since it uses as much as digits as its factorization.

84129211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 28.

The square root of 84129211 is about 9172.1977191947. The cubic root of 84129211 is about 438.1763553157.

The spelling of 84129211 in words is "eighty-four million, one hundred twenty-nine thousand, two hundred eleven".