83864881 has 2 divisors, whose sum is σ = 83864882. Its totient is φ = 83864880.

The previous prime is 83864863. The next prime is 83864909. The reversal of 83864881 is 18846838.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82446400 + 1418481 = 9080^2 + 1191^2 .

It is a cyclic number.

It is not a de Polignac number, because 83864881 - 2¹⁵ = 83832113 is a prime.

It is a super-2 number, since 2×83864881² = 14066636530288322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (83864821) 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, 41932440 + 41932441.

It is an arithmetic number, because the mean of its divisors is an integer number (41932441).

Almost surely, 2^83864881 is an apocalyptic number.

It is an amenable number.

83864881 is a deficient number, since it is larger than the sum of its proper divisors (1).

83864881 is an equidigital number, since it uses as much as digits as its factorization.

83864881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 294912, while the sum is 46.

The square root of 83864881 is about 9157.7770774353. Note that the first 3 decimals coincide. The cubic root of 83864881 is about 437.7169640593.

The spelling of 83864881 in words is "eighty-three million, eight hundred sixty-four thousand, eight hundred eighty-one".