86195721 has 8 divisors (see below), whose sum is σ = 115002144. Its totient is φ = 57426560.

The previous prime is 86195719. The next prime is 86195731. The reversal of 86195721 is 12759168.

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 86195721 - 2¹ = 86195719 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86195721.

It is not an unprimeable number, because it can be changed into a prime (86195731) 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, 3375 + ... + 13556.

It is an arithmetic number, because the mean of its divisors is an integer number (14375268).

Almost surely, 2^86195721 is an apocalyptic number.

It is an amenable number.

86195721 is a deficient number, since it is larger than the sum of its proper divisors (28806423).

86195721 is a wasteful number, since it uses less digits than its factorization.

86195721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18631.

The product of its digits is 30240, while the sum is 39.

The square root of 86195721 is about 9284.1650674684. The cubic root of 86195721 is about 441.7350927250.

The spelling of 86195721 in words is "eighty-six million, one hundred ninety-five thousand, seven hundred twenty-one".