83027561 has 2 divisors, whose sum is σ = 83027562. Its totient is φ = 83027560.

The previous prime is 83027543. The next prime is 83027563. The reversal of 83027561 is 16572038.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52113961 + 30913600 = 7219^2 + 5560^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83027561 is a prime.

Together with 83027563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (83027563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41513780 + 41513781.

It is an arithmetic number, because the mean of its divisors is an integer number (41513781).

Almost surely, 2^83027561 is an apocalyptic number.

It is an amenable number.

83027561 is a deficient number, since it is larger than the sum of its proper divisors (1).

83027561 is an equidigital number, since it uses as much as digits as its factorization.

83027561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 83027561 is about 9111.9460599808. The cubic root of 83027561 is about 436.2553441435.

Adding to 83027561 its reverse (16572038), we get a palindrome (99599599).

The spelling of 83027561 in words is "eighty-three million, twenty-seven thousand, five hundred sixty-one".