129718739 has 2 divisors, whose sum is σ = 129718740. Its totient is φ = 129718738.

The previous prime is 129718733. The next prime is 129718751. The reversal of 129718739 is 937817921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129718739 - 2⁴ = 129718723 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 129718693 and 129718702.

It is not a weakly prime, because it can be changed into another prime (129718733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64859369 + 64859370.

It is an arithmetic number, because the mean of its divisors is an integer number (64859370).

Almost surely, 2^129718739 is an apocalyptic number.

129718739 is a deficient number, since it is larger than the sum of its proper divisors (1).

129718739 is an equidigital number, since it uses as much as digits as its factorization.

129718739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 47.

The square root of 129718739 is about 11389.4134616318. The cubic root of 129718739 is about 506.2141019305.

The spelling of 129718739 in words is "one hundred twenty-nine million, seven hundred eighteen thousand, seven hundred thirty-nine".