129019739 has 2 divisors, whose sum is σ = 129019740. Its totient is φ = 129019738.

The previous prime is 129019717. The next prime is 129019741. The reversal of 129019739 is 937910921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129019739 - 2⁸ = 129019483 is a prime.

Together with 129019741, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 129019696 and 129019705.

It is not a weakly prime, because it can be changed into another prime (129019769) 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, 64509869 + 64509870.

It is an arithmetic number, because the mean of its divisors is an integer number (64509870).

Almost surely, 2^129019739 is an apocalyptic number.

129019739 is a deficient number, since it is larger than the sum of its proper divisors (1).

129019739 is an equidigital number, since it uses as much as digits as its factorization.

129019739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30618, while the sum is 41.

The square root of 129019739 is about 11358.6856193840. The cubic root of 129019739 is about 505.3032051669.

The spelling of 129019739 in words is "one hundred twenty-nine million, nineteen thousand, seven hundred thirty-nine".