84768109 has 8 divisors (see below), whose sum is σ = 85588920. Its totient is φ = 83951616.

The previous prime is 84768091. The next prime is 84768121. The reversal of 84768109 is 90186748.

It can be written as a sum of positive squares in 4 ways, for example, as 14040009 + 70728100 = 3747^2 + 8410^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 84768109 - 2⁵ = 84768077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84768209) 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, 48747 + ... + 50455.

It is an arithmetic number, because the mean of its divisors is an integer number (10698615).

Almost surely, 2^84768109 is an apocalyptic number.

It is an amenable number.

84768109 is a deficient number, since it is larger than the sum of its proper divisors (820811).

84768109 is a wasteful number, since it uses less digits than its factorization.

84768109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2159.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 84768109 is about 9206.9598130979. The cubic root of 84768109 is about 439.2827657161.

The spelling of 84768109 in words is "eighty-four million, seven hundred sixty-eight thousand, one hundred nine".