85681033 has 4 divisors (see below), whose sum is σ = 86306580. Its totient is φ = 85055488.

The previous prime is 85681031. The next prime is 85681067. The reversal of 85681033 is 33018658.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31393609 + 54287424 = 5603^2 + 7368^2 .

It is a cyclic number.

It is not a de Polignac number, because 85681033 - 2¹ = 85681031 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85681033.

It is not an unprimeable number, because it can be changed into a prime (85681031) 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, 312568 + ... + 312841.

It is an arithmetic number, because the mean of its divisors is an integer number (21576645).

Almost surely, 2^85681033 is an apocalyptic number.

It is an amenable number.

85681033 is a deficient number, since it is larger than the sum of its proper divisors (625547).

85681033 is a wasteful number, since it uses less digits than its factorization.

85681033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625546.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 85681033 is about 9256.4049716939. The cubic root of 85681033 is about 440.8541140198.

The spelling of 85681033 in words is "eighty-five million, six hundred eighty-one thousand, thirty-three".