83244781 has 2 divisors, whose sum is σ = 83244782. Its totient is φ = 83244780.

The previous prime is 83244779. The next prime is 83244829. The reversal of 83244781 is 18744238.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66096900 + 17147881 = 8130^2 + 4141^2 .

It is a cyclic number.

It is not a de Polignac number, because 83244781 - 2¹ = 83244779 is a prime.

It is a super-2 number, since 2×83244781² = 13859387127475922, which contains 22 as substring.

Together with 83244779, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 83244781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83244701) 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, 41622390 + 41622391.

It is an arithmetic number, because the mean of its divisors is an integer number (41622391).

Almost surely, 2^83244781 is an apocalyptic number.

It is an amenable number.

83244781 is a deficient number, since it is larger than the sum of its proper divisors (1).

83244781 is an equidigital number, since it uses as much as digits as its factorization.

83244781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43008, while the sum is 37.

The square root of 83244781 is about 9123.8577915266. The cubic root of 83244781 is about 436.6354623572.

The spelling of 83244781 in words is "eighty-three million, two hundred forty-four thousand, seven hundred eighty-one".