83981329 has 2 divisors, whose sum is σ = 83981330. Its totient is φ = 83981328.

The previous prime is 83981327. The next prime is 83981353. The reversal of 83981329 is 92318938.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52171729 + 31809600 = 7223^2 + 5640^2 .

It is a cyclic number.

It is not a de Polignac number, because 83981329 - 2¹ = 83981327 is a prime.

Together with 83981327, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (83981321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41990664 + 41990665.

It is an arithmetic number, because the mean of its divisors is an integer number (41990665).

Almost surely, 2^83981329 is an apocalyptic number.

It is an amenable number.

83981329 is a deficient number, since it is larger than the sum of its proper divisors (1).

83981329 is an equidigital number, since it uses as much as digits as its factorization.

83981329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 43.

The square root of 83981329 is about 9164.1327467470. The cubic root of 83981329 is about 437.9194631709.

The spelling of 83981329 in words is "eighty-three million, nine hundred eighty-one thousand, three hundred twenty-nine".