83608561 has 2 divisors, whose sum is σ = 83608562. Its totient is φ = 83608560.

The previous prime is 83608543. The next prime is 83608631. The reversal of 83608561 is 16580638.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43362225 + 40246336 = 6585^2 + 6344^2 .

It is a cyclic number.

It is not a de Polignac number, because 83608561 - 2⁵ = 83608529 is a prime.

It is equal to p_4867570 and since 83608561 and 4867570 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 83608561.

It is not a weakly prime, because it can be changed into another prime (83608541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41804280 + 41804281.

It is an arithmetic number, because the mean of its divisors is an integer number (41804281).

Almost surely, 2^83608561 is an apocalyptic number.

It is an amenable number.

83608561 is a deficient number, since it is larger than the sum of its proper divisors (1).

83608561 is an equidigital number, since it uses as much as digits as its factorization.

83608561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 83608561 is about 9143.7717053741. The cubic root of 83608561 is about 437.2705709716.

The spelling of 83608561 in words is "eighty-three million, six hundred eight thousand, five hundred sixty-one".