85682813 has 2 divisors, whose sum is σ = 85682814. Its totient is φ = 85682812.

The previous prime is 85682783. The next prime is 85682819. The reversal of 85682813 is 31828658.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84676804 + 1006009 = 9202^2 + 1003^2 .

It is a cyclic number.

It is not a de Polignac number, because 85682813 - 2¹⁴ = 85666429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85682819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42841406 + 42841407.

It is an arithmetic number, because the mean of its divisors is an integer number (42841407).

Almost surely, 2^85682813 is an apocalyptic number.

It is an amenable number.

85682813 is a deficient number, since it is larger than the sum of its proper divisors (1).

85682813 is an equidigital number, since it uses as much as digits as its factorization.

85682813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92160, while the sum is 41.

The square root of 85682813 is about 9256.5011208339. The cubic root of 85682813 is about 440.8571668732.

The spelling of 85682813 in words is "eighty-five million, six hundred eighty-two thousand, eight hundred thirteen".