83306321 has 6 divisors (see below), whose sum is σ = 96907410. Its totient is φ = 71405376.

The previous prime is 83306291. The next prime is 83306323. The reversal of 83306321 is 12360338.

It can be written as a sum of positive squares in only one way, i.e., 82174225 + 1132096 = 9065^2 + 1064^2 .

It is not a de Polignac number, because 83306321 - 2⁶ = 83306257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83306323) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 850016 + ... + 850113.

It is an arithmetic number, because the mean of its divisors is an integer number (16151235).

Almost surely, 2^83306321 is an apocalyptic number.

It is an amenable number.

83306321 is a deficient number, since it is larger than the sum of its proper divisors (13601089).

83306321 is a wasteful number, since it uses less digits than its factorization.

83306321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1700143 (or 1700136 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 83306321 is about 9127.2296454072. The cubic root of 83306321 is about 436.7430323744.

Adding to 83306321 its reverse (12360338), we get a palindrome (95666659).

The spelling of 83306321 in words is "eighty-three million, three hundred six thousand, three hundred twenty-one".