85767321 has 16 divisors (see below), whose sum is σ = 115501760. Its totient is φ = 56609280.

The previous prime is 85767317. The next prime is 85767323. The reversal of 85767321 is 12376758.

It is not a de Polignac number, because 85767321 - 2² = 85767317 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 85767321.

It is not an unprimeable number, because it can be changed into a prime (85767323) 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 15 ways as a sum of consecutive naturals, for example, 226110 + ... + 226488.

It is an arithmetic number, because the mean of its divisors is an integer number (7218860).

Almost surely, 2^85767321 is an apocalyptic number.

It is an amenable number.

85767321 is a deficient number, since it is larger than the sum of its proper divisors (29734439).

85767321 is a wasteful number, since it uses less digits than its factorization.

85767321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936.

The product of its digits is 70560, while the sum is 39.

The square root of 85767321 is about 9261.0647875933. The cubic root of 85767321 is about 441.0020567466.

The spelling of 85767321 in words is "eighty-five million, seven hundred sixty-seven thousand, three hundred twenty-one".