85259813 has 4 divisors (see below), whose sum is σ = 85642368. Its totient is φ = 84877260.

The previous prime is 85259809. The next prime is 85259843. The reversal of 85259813 is 31895258.

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 85259813 - 2² = 85259809 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 (85259843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190943 + ... + 191388.

It is an arithmetic number, because the mean of its divisors is an integer number (21410592).

Almost surely, 2^85259813 is an apocalyptic number.

It is an amenable number.

85259813 is a deficient number, since it is larger than the sum of its proper divisors (382555).

85259813 is a wasteful number, since it uses less digits than its factorization.

85259813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382554.

The product of its digits is 86400, while the sum is 41.

The square root of 85259813 is about 9233.6240447616. The cubic root of 85259813 is about 440.1304933198.

The spelling of 85259813 in words is "eighty-five million, two hundred fifty-nine thousand, eight hundred thirteen".