84659805 has 12 divisors (see below), whose sum is σ = 146743740. Its totient is φ = 45151872.

The previous prime is 84659789. The next prime is 84659807. The reversal of 84659805 is 50895648.

It can be written as a sum of positive squares in 2 ways, for example, as 41139396 + 43520409 = 6414^2 + 6597^2 .

It is not a de Polignac number, because 84659805 - 2⁴ = 84659789 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1881329 = 84659805 / (8 + 4 + 6 + 5 + 9 + 8 + 0 + 5).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84659807) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 940620 + ... + 940709.

It is an arithmetic number, because the mean of its divisors is an integer number (12228645).

Almost surely, 2^84659805 is an apocalyptic number.

It is an amenable number.

84659805 is a deficient number, since it is larger than the sum of its proper divisors (62083935).

84659805 is a wasteful number, since it uses less digits than its factorization.

84659805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1881340 (or 1881337 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The square root of 84659805 is about 9201.0762957385. The cubic root of 84659805 is about 439.0956027312.

The spelling of 84659805 in words is "eighty-four million, six hundred fifty-nine thousand, eight hundred five".