85826721 has 8 divisors (see below), whose sum is σ = 114593440. Its totient is φ = 57138912.

The previous prime is 85826701. The next prime is 85826723. The reversal of 85826721 is 12762858.

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

It is not a de Polignac number, because 85826721 - 2¹³ = 85818529 is a prime.

It is a super-2 number, since 2×85826721² = 14732452075223682, which contains 22 as substring.

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 85826721.

It is not an unprimeable number, because it can be changed into a prime (85826723) 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, 17140 + ... + 21573.

It is an arithmetic number, because the mean of its divisors is an integer number (14324180).

Almost surely, 2^85826721 is an apocalyptic number.

It is an amenable number.

85826721 is a deficient number, since it is larger than the sum of its proper divisors (28766719).

85826721 is a wasteful number, since it uses less digits than its factorization.

85826721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39455.

The product of its digits is 53760, while the sum is 39.

The square root of 85826721 is about 9264.2712071700. The cubic root of 85826721 is about 441.1038417340.

The spelling of 85826721 in words is "eighty-five million, eight hundred twenty-six thousand, seven hundred twenty-one".