86444321 has 4 divisors (see below), whose sum is σ = 88780692. Its totient is φ = 84107952.

The previous prime is 86444317. The next prime is 86444339. The reversal of 86444321 is 12344468.

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 58354321 + 28090000 = 7639^2 + 5300^2 .

It is a cyclic number.

It is not a de Polignac number, because 86444321 - 2² = 86444317 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (86444021) 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, 1168130 + ... + 1168203.

It is an arithmetic number, because the mean of its divisors is an integer number (22195173).

Almost surely, 2^86444321 is an apocalyptic number.

It is an amenable number.

86444321 is a deficient number, since it is larger than the sum of its proper divisors (2336371).

86444321 is a wasteful number, since it uses less digits than its factorization.

86444321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2336370.

The product of its digits is 18432, while the sum is 32.

The square root of 86444321 is about 9297.5438154386. The cubic root of 86444321 is about 442.1593594889.

Adding to 86444321 its reverse (12344468), we get a palindrome (98788789).

The spelling of 86444321 in words is "eighty-six million, four hundred forty-four thousand, three hundred twenty-one".