84821705 has 8 divisors (see below), whose sum is σ = 101896704. Its totient is φ = 67783600.

The previous prime is 84821689. The next prime is 84821707. The reversal of 84821705 is 50712848.

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

It is not a de Polignac number, because 84821705 - 2⁴ = 84821689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84821707) 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, 3881 + ... + 13590.

It is an arithmetic number, because the mean of its divisors is an integer number (12737088).

Almost surely, 2^84821705 is an apocalyptic number.

It is an amenable number.

84821705 is a deficient number, since it is larger than the sum of its proper divisors (17074999).

84821705 is a wasteful number, since it uses less digits than its factorization.

84821705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18447.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 84821705 is about 9209.8699773667. The cubic root of 84821705 is about 439.3753274085.

The spelling of 84821705 in words is "eighty-four million, eight hundred twenty-one thousand, seven hundred five".