87723805 has 16 divisors (see below), whose sum is σ = 116134704. Its totient is φ = 63198720.

The previous prime is 87723803. The next prime is 87723833. The reversal of 87723805 is 50832778.

It can be written as a sum of positive squares in 8 ways, for example, as 22259524 + 65464281 = 4718^2 + 8091^2 .

It is not a de Polignac number, because 87723805 - 2¹ = 87723803 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 (87723803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13794 + ... + 19123.

It is an arithmetic number, because the mean of its divisors is an integer number (7258419).

Almost surely, 2^87723805 is an apocalyptic number.

It is an amenable number.

87723805 is a deficient number, since it is larger than the sum of its proper divisors (28410899).

87723805 is a wasteful number, since it uses less digits than its factorization.

87723805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32976.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 87723805 is about 9366.0987075730. The cubic root of 87723805 is about 444.3301878635.

The spelling of 87723805 in words is "eighty-seven million, seven hundred twenty-three thousand, eight hundred five".