87804205 has 4 divisors (see below), whose sum is σ = 105365052. Its totient is φ = 70243360.

The previous prime is 87804203. The next prime is 87804217. The reversal of 87804205 is 50240878.

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 47087044 + 40717161 = 6862^2 + 6381^2 .

It is not a de Polignac number, because 87804205 - 2¹ = 87804203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87804203) 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, 8780416 + ... + 8780425.

It is an arithmetic number, because the mean of its divisors is an integer number (26341263).

Almost surely, 2^87804205 is an apocalyptic number.

It is an amenable number.

87804205 is a deficient number, since it is larger than the sum of its proper divisors (17560847).

87804205 is a wasteful number, since it uses less digits than its factorization.

87804205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17560846.

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 87804205 is about 9370.3897997895. The cubic root of 87804205 is about 444.4658911989.

The spelling of 87804205 in words is "eighty-seven million, eight hundred four thousand, two hundred five".