129749959 has 2 divisors, whose sum is σ = 129749960. Its totient is φ = 129749958.

The previous prime is 129749957. The next prime is 129750007. The reversal of 129749959 is 959947921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129749959 - 2¹ = 129749957 is a prime.

Together with 129749957, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129749951) 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, 64874979 + 64874980.

It is an arithmetic number, because the mean of its divisors is an integer number (64874980).

Almost surely, 2^129749959 is an apocalyptic number.

129749959 is a deficient number, since it is larger than the sum of its proper divisors (1).

129749959 is an equidigital number, since it uses as much as digits as its factorization.

129749959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1837080, while the sum is 55.

The square root of 129749959 is about 11390.7839501941. The cubic root of 129749959 is about 506.2547096244.

The spelling of 129749959 in words is "one hundred twenty-nine million, seven hundred forty-nine thousand, nine hundred fifty-nine".