85384865 has 4 divisors (see below), whose sum is σ = 102461844. Its totient is φ = 68307888.

The previous prime is 85384861. The next prime is 85384877. The reversal of 85384865 is 56848358.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10804369 + 74580496 = 3287^2 + 8636^2 .

It is a cyclic number.

It is not a de Polignac number, because 85384865 - 2² = 85384861 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85384861) 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, 8538482 + ... + 8538491.

It is an arithmetic number, because the mean of its divisors is an integer number (25615461).

Almost surely, 2^85384865 is an apocalyptic number.

It is an amenable number.

85384865 is a deficient number, since it is larger than the sum of its proper divisors (17076979).

85384865 is a wasteful number, since it uses less digits than its factorization.

85384865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17076978.

The product of its digits is 921600, while the sum is 47.

The square root of 85384865 is about 9240.3931193429. The cubic root of 85384865 is about 440.3455704644.

The spelling of 85384865 in words is "eighty-five million, three hundred eighty-four thousand, eight hundred sixty-five".