83320285 has 4 divisors (see below), whose sum is σ = 99984348. Its totient is φ = 66656224.

The previous prime is 83320271. The next prime is 83320291. The reversal of 83320285 is 58202338.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58202338 = 2 ⋅29101169.

It can be written as a sum of positive squares in 2 ways, for example, as 53846244 + 29474041 = 7338^2 + 5429^2 .

It is a cyclic number.

It is not a de Polignac number, because 83320285 - 2¹⁹ = 82795997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8332024 + ... + 8332033.

It is an arithmetic number, because the mean of its divisors is an integer number (24996087).

Almost surely, 2^83320285 is an apocalyptic number.

It is an amenable number.

83320285 is a deficient number, since it is larger than the sum of its proper divisors (16664063).

83320285 is a wasteful number, since it uses less digits than its factorization.

83320285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16664062.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 83320285 is about 9127.9945771237. The cubic root of 83320285 is about 436.7674336400.

The spelling of 83320285 in words is "eighty-three million, three hundred twenty thousand, two hundred eighty-five".