86648721 has 8 divisors (see below), whose sum is σ = 121612320. Its totient is φ = 54725472.

The previous prime is 86648719. The next prime is 86648753. The reversal of 86648721 is 12784668.

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

It is not a de Polignac number, because 86648721 - 2¹ = 86648719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86649721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 760020 + ... + 760133.

It is an arithmetic number, because the mean of its divisors is an integer number (15201540).

Almost surely, 2^86648721 is an apocalyptic number.

It is an amenable number.

86648721 is a deficient number, since it is larger than the sum of its proper divisors (34963599).

86648721 is a wasteful number, since it uses less digits than its factorization.

86648721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1520175.

The product of its digits is 129024, while the sum is 42.

The square root of 86648721 is about 9308.5294757013. The cubic root of 86648721 is about 442.5075845360.

The spelling of 86648721 in words is "eighty-six million, six hundred forty-eight thousand, seven hundred twenty-one".