83966881 has 2 divisors, whose sum is σ = 83966882. Its totient is φ = 83966880.

The previous prime is 83966837. The next prime is 83966887. The reversal of 83966881 is 18866938.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52707600 + 31259281 = 7260^2 + 5591^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83966881 is a prime.

It is a super-2 number, since 2×83966881² = 14100874209736322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (83966887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41983440 + 41983441.

It is an arithmetic number, because the mean of its divisors is an integer number (41983441).

Almost surely, 2^83966881 is an apocalyptic number.

It is an amenable number.

83966881 is a deficient number, since it is larger than the sum of its proper divisors (1).

83966881 is an equidigital number, since it uses as much as digits as its factorization.

83966881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 49.

The square root of 83966881 is about 9163.3444222074. The cubic root of 83966881 is about 437.8943487661.

The spelling of 83966881 in words is "eighty-three million, nine hundred sixty-six thousand, eight hundred eighty-one".