85210087 has 4 divisors (see below), whose sum is σ = 85231720. Its totient is φ = 85188456.

The previous prime is 85210067. The next prime is 85210127. The reversal of 85210087 is 78001258.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78001258 = 2 ⋅39000629.

It is a cyclic number.

It is not a de Polignac number, because 85210087 - 2⁷ = 85209959 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 (85210007) 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, 3048 + ... + 13405.

It is an arithmetic number, because the mean of its divisors is an integer number (21307930).

Almost surely, 2^85210087 is an apocalyptic number.

85210087 is a deficient number, since it is larger than the sum of its proper divisors (21633).

85210087 is a wasteful number, since it uses less digits than its factorization.

85210087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21632.

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 85210087 is about 9230.9309931339. The cubic root of 85210087 is about 440.0449110494.

The spelling of 85210087 in words is "eighty-five million, two hundred ten thousand, eighty-seven".