85306813 has 4 divisors (see below), whose sum is σ = 85388128. Its totient is φ = 85225500.

The previous prime is 85306811. The next prime is 85306817. The reversal of 85306813 is 31860358.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85306813 - 2¹ = 85306811 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 (85306811) 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, 39063 + ... + 41188.

It is an arithmetic number, because the mean of its divisors is an integer number (21347032).

Almost surely, 2^85306813 is an apocalyptic number.

It is an amenable number.

85306813 is a deficient number, since it is larger than the sum of its proper divisors (81315).

85306813 is a wasteful number, since it uses less digits than its factorization.

85306813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81314.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 85306813 is about 9236.1687403382. The cubic root of 85306813 is about 440.2113533503.

The spelling of 85306813 in words is "eighty-five million, three hundred six thousand, eight hundred thirteen".