84216129 has 8 divisors (see below), whose sum is σ = 112870752. Its totient is φ = 55852800.

The previous prime is 84216127. The next prime is 84216137. The reversal of 84216129 is 92161248.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 84216129 - 2¹ = 84216127 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 84216129.

It is not an unprimeable number, because it can be changed into a prime (84216127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72147 + ... + 73304.

It is an arithmetic number, because the mean of its divisors is an integer number (14108844).

Almost surely, 2^84216129 is an apocalyptic number.

It is an amenable number.

84216129 is a deficient number, since it is larger than the sum of its proper divisors (28654623).

84216129 is a wasteful number, since it uses less digits than its factorization.

84216129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145647.

The product of its digits is 6912, while the sum is 33.

The square root of 84216129 is about 9176.9346189237. The cubic root of 84216129 is about 438.3272038480.

The spelling of 84216129 in words is "eighty-four million, two hundred sixteen thousand, one hundred twenty-nine".