85285919 has 4 divisors (see below), whose sum is σ = 85354920. Its totient is φ = 85216920.

The previous prime is 85285913. The next prime is 85285939. The reversal of 85285919 is 91958258.

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

It is a cyclic number.

It is not a de Polignac number, because 85285919 - 2²⁴ = 68508703 is a prime.

It is a super-2 number, since 2×85285919² = 14547375959349122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85285913) 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, 32612 + ... + 35129.

It is an arithmetic number, because the mean of its divisors is an integer number (21338730).

Almost surely, 2^85285919 is an apocalyptic number.

85285919 is a deficient number, since it is larger than the sum of its proper divisors (69001).

85285919 is a wasteful number, since it uses less digits than its factorization.

85285919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69000.

The product of its digits is 259200, while the sum is 47.

The square root of 85285919 is about 9235.0375743686. The cubic root of 85285919 is about 440.1754104335.

The spelling of 85285919 in words is "eighty-five million, two hundred eighty-five thousand, nine hundred nineteen".