84242286809 has 4 divisors (see below), whose sum is σ = 84259231716. Its totient is φ = 84225341904.

The previous prime is 84242286803. The next prime is 84242286851. The reversal of 84242286809 is 90868224248.

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 25906512025 + 58335774784 = 160955^2 + 241528^2 .

It is a cyclic number.

It is not a de Polignac number, because 84242286809 - 2¹² = 84242282713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84242286803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8464994 + ... + 8474939.

It is an arithmetic number, because the mean of its divisors is an integer number (21064807929).

Almost surely, 2^84242286809 is an apocalyptic number.

It is an amenable number.

84242286809 is a deficient number, since it is larger than the sum of its proper divisors (16944907).

84242286809 is a wasteful number, since it uses less digits than its factorization.

84242286809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16944906.

The product of its (nonzero) digits is 3538944, while the sum is 53.

The spelling of 84242286809 in words is "eighty-four billion, two hundred forty-two million, two hundred eighty-six thousand, eight hundred nine".