85212613 has 2 divisors, whose sum is σ = 85212614. Its totient is φ = 85212612.

The previous prime is 85212601. The next prime is 85212641. The reversal of 85212613 is 31621258.

It is an a-pointer prime, because the next prime (85212641) can be obtained adding 85212613 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83777409 + 1435204 = 9153^2 + 1198^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85212613 is a prime.

It is a super-2 number, since 2×85212613² = 14522378828575538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85212013) 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 as a sum of consecutive naturals, namely, 42606306 + 42606307.

It is an arithmetic number, because the mean of its divisors is an integer number (42606307).

Almost surely, 2^85212613 is an apocalyptic number.

It is an amenable number.

85212613 is a deficient number, since it is larger than the sum of its proper divisors (1).

85212613 is an equidigital number, since it uses as much as digits as its factorization.

85212613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 28.

The square root of 85212613 is about 9231.0678147222. The cubic root of 85212613 is about 440.0492592922.

The spelling of 85212613 in words is "eighty-five million, two hundred twelve thousand, six hundred thirteen".