86652721 has 8 divisors (see below), whose sum is σ = 90443304. Its totient is φ = 82942080.

The previous prime is 86652677. The next prime is 86652733. The reversal of 86652721 is 12725668.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 69696 + 86583025 = 264^2 + 9305^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86652721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86652751) 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, 17766 + ... + 22111.

It is an arithmetic number, because the mean of its divisors is an integer number (11305413).

Almost surely, 2^86652721 is an apocalyptic number.

It is an amenable number.

86652721 is a deficient number, since it is larger than the sum of its proper divisors (3790583).

86652721 is a wasteful number, since it uses less digits than its factorization.

86652721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39971.

The product of its digits is 40320, while the sum is 37.

The square root of 86652721 is about 9308.7443299298. The cubic root of 86652721 is about 442.5143936501.

The spelling of 86652721 in words is "eighty-six million, six hundred fifty-two thousand, seven hundred twenty-one".