85238813 has 6 divisors (see below), whose sum is σ = 93692382. Its totient is φ = 77489720.

The previous prime is 85238779. The next prime is 85238819. The reversal of 85238813 is 31883258.

It can be written as a sum of positive squares in only one way, i.e., 84971524 + 267289 = 9218^2 + 517^2 .

It is not a de Polignac number, because 85238813 - 2⁶ = 85238749 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 (85238819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 352106 + ... + 352347.

It is an arithmetic number, because the mean of its divisors is an integer number (15615397).

Almost surely, 2^85238813 is an apocalyptic number.

It is an amenable number.

85238813 is a deficient number, since it is larger than the sum of its proper divisors (8453569).

85238813 is a wasteful number, since it uses less digits than its factorization.

85238813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704475 (or 704464 counting only the distinct ones).

The product of its digits is 46080, while the sum is 38.

The square root of 85238813 is about 9232.4868264190. The cubic root of 85238813 is about 440.0943547649.

The spelling of 85238813 in words is "eighty-five million, two hundred thirty-eight thousand, eight hundred thirteen".