84705689 has 4 divisors (see below), whose sum is σ = 84933156. Its totient is φ = 84478224.

The previous prime is 84705683. The next prime is 84705697. The reversal of 84705689 is 98650748.

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 65739664 + 18966025 = 8108^2 + 4355^2 .

It is a cyclic number.

It is not a de Polignac number, because 84705689 - 2¹² = 84701593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84705683) 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, 113174 + ... + 113919.

It is an arithmetic number, because the mean of its divisors is an integer number (21233289).

Almost surely, 2^84705689 is an apocalyptic number.

It is an amenable number.

84705689 is a deficient number, since it is larger than the sum of its proper divisors (227467).

84705689 is a wasteful number, since it uses less digits than its factorization.

84705689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227466.

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 84705689 is about 9203.5693619378. The cubic root of 84705689 is about 439.1749155523.

The spelling of 84705689 in words is "eighty-four million, seven hundred five thousand, six hundred eighty-nine".