84320785 has 4 divisors (see below), whose sum is σ = 101184948. Its totient is φ = 67456624.

The previous prime is 84320771. The next prime is 84320791. The reversal of 84320785 is 58702348.

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 19421649 + 64899136 = 4407^2 + 8056^2 .

It is a cyclic number.

It is not a de Polignac number, because 84320785 - 2¹⁷ = 84189713 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8432074 + ... + 8432083.

It is an arithmetic number, because the mean of its divisors is an integer number (25296237).

Almost surely, 2^84320785 is an apocalyptic number.

It is an amenable number.

84320785 is a deficient number, since it is larger than the sum of its proper divisors (16864163).

84320785 is a wasteful number, since it uses less digits than its factorization.

84320785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16864162.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 84320785 is about 9182.6349704211. The cubic root of 84320785 is about 438.5086994950.

The spelling of 84320785 in words is "eighty-four million, three hundred twenty thousand, seven hundred eighty-five".