87015859 has 4 divisors (see below), whose sum is σ = 99446704. Its totient is φ = 74585016.

The previous prime is 87015827. The next prime is 87015869. The reversal of 87015859 is 95851078.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95851078 = 2 ⋅47925539.

It is a cyclic number.

It is not a de Polignac number, because 87015859 - 2⁵ = 87015827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87015869) 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, 6215412 + ... + 6215425.

It is an arithmetic number, because the mean of its divisors is an integer number (24861676).

Almost surely, 2^87015859 is an apocalyptic number.

87015859 is a deficient number, since it is larger than the sum of its proper divisors (12430845).

87015859 is a wasteful number, since it uses less digits than its factorization.

87015859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12430844.

The product of its (nonzero) digits is 100800, while the sum is 43.

The square root of 87015859 is about 9328.2291459848. The cubic root of 87015859 is about 443.1316846654.

The spelling of 87015859 in words is "eighty-seven million, fifteen thousand, eight hundred fifty-nine".