85859987 has 4 divisors (see below), whose sum is σ = 88629696. Its totient is φ = 83090280.

The previous prime is 85859971. The next prime is 85860037. The reversal of 85859987 is 78995858.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78995858 = 2 ⋅39497929.

It is a cyclic number.

It is not a de Polignac number, because 85859987 - 2⁴ = 85859971 is a prime.

It is a super-3 number, since 3×85859987³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85859957) 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, 1384808 + ... + 1384869.

It is an arithmetic number, because the mean of its divisors is an integer number (22157424).

Almost surely, 2^85859987 is an apocalyptic number.

85859987 is a deficient number, since it is larger than the sum of its proper divisors (2769709).

85859987 is a wasteful number, since it uses less digits than its factorization.

85859987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2769708.

The product of its digits is 7257600, while the sum is 59.

The square root of 85859987 is about 9266.0664254040. The cubic root of 85859987 is about 441.1608242402.

The spelling of 85859987 in words is "eighty-five million, eight hundred fifty-nine thousand, nine hundred eighty-seven".