86996221 has 4 divisors (see below), whose sum is σ = 93688252. Its totient is φ = 80304192.

The previous prime is 86996207. The next prime is 86996227. The reversal of 86996221 is 12269968.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19263321 + 67732900 = 4389^2 + 8230^2 .

It is a cyclic number.

It is not a de Polignac number, because 86996221 - 2⁷ = 86996093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86996227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3345996 + ... + 3346021.

It is an arithmetic number, because the mean of its divisors is an integer number (23422063).

Almost surely, 2^86996221 is an apocalyptic number.

It is an amenable number.

86996221 is a deficient number, since it is larger than the sum of its proper divisors (6692031).

86996221 is a wasteful number, since it uses less digits than its factorization.

86996221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6692030.

The product of its digits is 93312, while the sum is 43.

The square root of 86996221 is about 9327.1764752255. The cubic root of 86996221 is about 443.0983463949.

The spelling of 86996221 in words is "eighty-six million, nine hundred ninety-six thousand, two hundred twenty-one".