85681229 has 8 divisors (see below), whose sum is σ = 86717952. Its totient is φ = 84648400.

The previous prime is 85681199. The next prime is 85681243. The reversal of 85681229 is 92218658.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85681229 - 2¹² = 85677133 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 (85681249) 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 7 ways as a sum of consecutive naturals, for example, 86672 + ... + 87654.

It is an arithmetic number, because the mean of its divisors is an integer number (10839744).

Almost surely, 2^85681229 is an apocalyptic number.

It is an amenable number.

85681229 is a deficient number, since it is larger than the sum of its proper divisors (1036723).

85681229 is a wasteful number, since it uses less digits than its factorization.

85681229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1947.

The product of its digits is 69120, while the sum is 41.

The square root of 85681229 is about 9256.4155589515. The cubic root of 85681229 is about 440.8544501788.

The spelling of 85681229 in words is "eighty-five million, six hundred eighty-one thousand, two hundred twenty-nine".