87915859 has 4 divisors (see below), whose sum is σ = 89228104. Its totient is φ = 86603616.

The previous prime is 87915833. The next prime is 87915881. The reversal of 87915859 is 95851978.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 87915859 - 2⁵ = 87915827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87916859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 656022 + ... + 656155.

It is an arithmetic number, because the mean of its divisors is an integer number (22307026).

Almost surely, 2^87915859 is an apocalyptic number.

87915859 is a deficient number, since it is larger than the sum of its proper divisors (1312245).

87915859 is a wasteful number, since it uses less digits than its factorization.

87915859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1312244.

The product of its digits is 907200, while the sum is 52.

The square root of 87915859 is about 9376.3457167491. The cubic root of 87915859 is about 444.6542093403.

The spelling of 87915859 in words is "eighty-seven million, nine hundred fifteen thousand, eight hundred fifty-nine".