84206305 has 4 divisors (see below), whose sum is σ = 101047572. Its totient is φ = 67365040.

The previous prime is 84206257. The next prime is 84206327. The reversal of 84206305 is 50360248.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51955264 + 32251041 = 7208^2 + 5679^2 .

It is not a de Polignac number, because 84206305 - 2¹³ = 84198113 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8420626 + ... + 8420635.

It is an arithmetic number, because the mean of its divisors is an integer number (25261893).

Almost surely, 2^84206305 is an apocalyptic number.

It is an amenable number.

84206305 is a deficient number, since it is larger than the sum of its proper divisors (16841267).

84206305 is a wasteful number, since it uses less digits than its factorization.

84206305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16841266.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 84206305 is about 9176.3993483283. The cubic root of 84206305 is about 438.3101592353.

The spelling of 84206305 in words is "eighty-four million, two hundred six thousand, three hundred five".