85216687 has 4 divisors (see below), whose sum is σ = 87029856. Its totient is φ = 83403520.

The previous prime is 85216673. The next prime is 85216693. The reversal of 85216687 is 78661258.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85216687 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 (85216627) 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, 906514 + ... + 906607.

It is an arithmetic number, because the mean of its divisors is an integer number (21757464).

Almost surely, 2^85216687 is an apocalyptic number.

85216687 is a deficient number, since it is larger than the sum of its proper divisors (1813169).

85216687 is a wasteful number, since it uses less digits than its factorization.

85216687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1813168.

The product of its digits is 161280, while the sum is 43.

The square root of 85216687 is about 9231.2884799469. The cubic root of 85216687 is about 440.0562720730.

The spelling of 85216687 in words is "eighty-five million, two hundred sixteen thousand, six hundred eighty-seven".