83220569 has 2 divisors, whose sum is σ = 83220570. Its totient is φ = 83220568.

The previous prime is 83220541. The next prime is 83220619. The reversal of 83220569 is 96502238.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80371225 + 2849344 = 8965^2 + 1688^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83220569 is a prime.

It is a super-2 number, since 2×83220569² = 13851326209367522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (83220539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41610284 + 41610285.

It is an arithmetic number, because the mean of its divisors is an integer number (41610285).

Almost surely, 2^83220569 is an apocalyptic number.

It is an amenable number.

83220569 is a deficient number, since it is larger than the sum of its proper divisors (1).

83220569 is an equidigital number, since it uses as much as digits as its factorization.

83220569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 83220569 is about 9122.5308440147. The cubic root of 83220569 is about 436.5931259977.

The spelling of 83220569 in words is "eighty-three million, two hundred twenty thousand, five hundred sixty-nine".