83333321 has 2 divisors, whose sum is σ = 83333322.
Its totient is φ = 83333320.
The previous prime is 83333317. The next prime is 83333333. The reversal of 83333321 is 12333338.
Adding to 83333321 its reverse (12333338), we get a palindrome (95666659).
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 82156096 + 1177225 = 9064^2 + 1085^2
It is a cyclic number.
It is not a de Polignac number, because 83333321 - 22 = 83333317 is a prime.
It is a Chen prime.
It is a nialpdrome in base 10.
It is not a weakly prime, because it can be changed into another prime (83333351) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41666660 + 41666661.
It is an arithmetic number, because the mean of its divisors is an integer number (41666661).
Almost surely, 283333321 is an apocalyptic number.
83333321 is the 4880-th centered heptagonal number.
It is an amenable number.
83333321 is a deficient number, since it is larger than the sum of its proper divisors (1).
83333321 is an equidigital number, since it uses as much as digits as its factorization.
83333321 is an evil number, because the sum of its binary digits is even.
The product of its digits is 3888, while the sum is 26.
The square root of 83333321 is about 9128.7086162283.
The cubic root of 83333321 is about 436.7902108198.
The spelling of 83333321 in words is "eighty-three million, three hundred thirty-three thousand, three hundred twenty-one".