84216529 has 2 divisors, whose sum is σ = 84216530. Its totient is φ = 84216528.

The previous prime is 84216511. The next prime is 84216563. The reversal of 84216529 is 92561248.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48790225 + 35426304 = 6985^2 + 5952^2 .

It is a cyclic number.

It is not a de Polignac number, because 84216529 - 2⁵ = 84216497 is a prime.

It is not a weakly prime, because it can be changed into another prime (84616529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42108264 + 42108265.

It is an arithmetic number, because the mean of its divisors is an integer number (42108265).

Almost surely, 2^84216529 is an apocalyptic number.

It is an amenable number.

84216529 is a deficient number, since it is larger than the sum of its proper divisors (1).

84216529 is an equidigital number, since it uses as much as digits as its factorization.

84216529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 37.

The square root of 84216529 is about 9176.9564126675. The cubic root of 84216529 is about 438.3278978188.

It can be divided in two parts, 842 and 16529, that added together give a palindrome (17371).

The spelling of 84216529 in words is "eighty-four million, two hundred sixteen thousand, five hundred twenty-nine".