85834813 has 2 divisors, whose sum is σ = 85834814. Its totient is φ = 85834812.

The previous prime is 85834807. The next prime is 85834817. The reversal of 85834813 is 31843858.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81685444 + 4149369 = 9038^2 + 2037^2 .

It is a cyclic number.

It is not a de Polignac number, because 85834813 - 2¹⁷ = 85703741 is a prime.

It is equal to p_4989424 and since 85834813 and 4989424 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85834817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42917406 + 42917407.

It is an arithmetic number, because the mean of its divisors is an integer number (42917407).

Almost surely, 2^85834813 is an apocalyptic number.

It is an amenable number.

85834813 is a deficient number, since it is larger than the sum of its proper divisors (1).

85834813 is an equidigital number, since it uses as much as digits as its factorization.

85834813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92160, while the sum is 40.

The square root of 85834813 is about 9264.7079284778. The cubic root of 85834813 is about 441.1177041616.

The spelling of 85834813 in words is "eighty-five million, eight hundred thirty-four thousand, eight hundred thirteen".