84983209 has 4 divisors (see below), whose sum is σ = 85052500. Its totient is φ = 84913920.

The previous prime is 84983189. The next prime is 84983231. The reversal of 84983209 is 90238948.

It is a happy number.

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 64080025 + 20903184 = 8005^2 + 4572^2 .

It is a cyclic number.

It is not a de Polignac number, because 84983209 - 2⁵ = 84983177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84983909) 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 in 3 ways as a sum of consecutive naturals, for example, 32772 + ... + 35269.

It is an arithmetic number, because the mean of its divisors is an integer number (21263125).

Almost surely, 2^84983209 is an apocalyptic number.

It is an amenable number.

84983209 is a deficient number, since it is larger than the sum of its proper divisors (69291).

84983209 is a wasteful number, since it uses less digits than its factorization.

84983209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69290.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 84983209 is about 9218.6337924879. The cubic root of 84983209 is about 439.6540134790.

It can be divided in two parts, 849 and 83209, that multiplied together give a triangular number (70644441 = T₁₁₈₈₆).

The spelling of 84983209 in words is "eighty-four million, nine hundred eighty-three thousand, two hundred nine".