129840983 has 2 divisors, whose sum is σ = 129840984. Its totient is φ = 129840982.

The previous prime is 129840961. The next prime is 129841007. The reversal of 129840983 is 389048921.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129840983 - 2¹⁰ = 129839959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129840283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64920491 + 64920492.

It is an arithmetic number, because the mean of its divisors is an integer number (64920492).

Almost surely, 2^129840983 is an apocalyptic number.

129840983 is a deficient number, since it is larger than the sum of its proper divisors (1).

129840983 is an equidigital number, since it uses as much as digits as its factorization.

129840983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 129840983 is about 11394.7787604674. The cubic root of 129840983 is about 506.3730669053.

The spelling of 129840983 in words is "one hundred twenty-nine million, eight hundred forty thousand, nine hundred eighty-three".