85306819 has 16 divisors (see below), whose sum is σ = 93717792. Its totient is φ = 77177088.

The previous prime is 85306817. The next prime is 85306843. The reversal of 85306819 is 91860358.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 85306819 - 2¹ = 85306817 is a prime.

It is a super-2 number, since 2×85306819² = 14554506735797522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85306811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186439 + ... + 186895.

It is an arithmetic number, because the mean of its divisors is an integer number (5857362).

Almost surely, 2^85306819 is an apocalyptic number.

85306819 is a deficient number, since it is larger than the sum of its proper divisors (8410973).

85306819 is a wasteful number, since it uses less digits than its factorization.

85306819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726.

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

The square root of 85306819 is about 9236.1690651482. The cubic root of 85306819 is about 440.2113636709.

The spelling of 85306819 in words is "eighty-five million, three hundred six thousand, eight hundred nineteen".