85806319 has 4 divisors (see below), whose sum is σ = 85858696. Its totient is φ = 85753944.

The previous prime is 85806289. The next prime is 85806323. The reversal of 85806319 is 91360858.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91360858 = 2 ⋅45680429.

It is a cyclic number.

It is not a de Polignac number, because 85806319 - 2¹³ = 85798127 is a prime.

It is a super-2 number, since 2×85806319² = 14725448760659522, 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 (85804319) 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, 23649 + ... + 27034.

It is an arithmetic number, because the mean of its divisors is an integer number (21464674).

Almost surely, 2^85806319 is an apocalyptic number.

85806319 is a deficient number, since it is larger than the sum of its proper divisors (52377).

85806319 is a wasteful number, since it uses less digits than its factorization.

85806319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52376.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 85806319 is about 9263.1700297468. The cubic root of 85806319 is about 441.0688871431.

It can be divided in two parts, 85 and 806319, that added together give a square (806404 = 898²).

The spelling of 85806319 in words is "eighty-five million, eight hundred six thousand, three hundred nineteen".