87550865 has 8 divisors (see below), whose sum is σ = 105213480. Its totient is φ = 69939072.

The previous prime is 87550849. The next prime is 87550873. The reversal of 87550865 is 56805578.

It can be written as a sum of positive squares in 4 ways, for example, as 12503296 + 75047569 = 3536^2 + 8663^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87550865 - 2⁴ = 87550849 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8804 + ... + 15893.

It is an arithmetic number, because the mean of its divisors is an integer number (13151685).

Almost surely, 2^87550865 is an apocalyptic number.

It is an amenable number.

87550865 is a deficient number, since it is larger than the sum of its proper divisors (17662615).

87550865 is a wasteful number, since it uses less digits than its factorization.

87550865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25411.

The product of its (nonzero) digits is 336000, while the sum is 44.

The square root of 87550865 is about 9356.8619205372. The cubic root of 87550865 is about 444.0380094209.

The spelling of 87550865 in words is "eighty-seven million, five hundred fifty thousand, eight hundred sixty-five".