84085809 has 8 divisors (see below), whose sum is σ = 112511712. Its totient is φ = 55858560.

The previous prime is 84085789. The next prime is 84085829. The reversal of 84085809 is 90858048.

It is an interprime number because it is at equal distance from previous prime (84085789) and next prime (84085829).

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

It is not a de Polignac number, because 84085809 - 2⁷ = 84085681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84085829) 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, 48672 + ... + 50369.

It is an arithmetic number, because the mean of its divisors is an integer number (14063964).

Almost surely, 2^84085809 is an apocalyptic number.

It is an amenable number.

84085809 is a deficient number, since it is larger than the sum of its proper divisors (28425903).

84085809 is a wasteful number, since it uses less digits than its factorization.

84085809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99327.

The product of its (nonzero) digits is 92160, while the sum is 42.

The square root of 84085809 is about 9169.8314597380. The cubic root of 84085809 is about 438.1009910782.

The spelling of 84085809 in words is "eighty-four million, eighty-five thousand, eight hundred nine".