129040739 has 2 divisors, whose sum is σ = 129040740. Its totient is φ = 129040738.

The previous prime is 129040679. The next prime is 129040753. The reversal of 129040739 is 937040921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129040739 - 2¹² = 129036643 is a prime.

It is a super-2 number, since 2×129040739² = 33303024643332242, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 129040699 and 129040708.

It is not a weakly prime, because it can be changed into another prime (129030739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64520369 + 64520370.

It is an arithmetic number, because the mean of its divisors is an integer number (64520370).

Almost surely, 2^129040739 is an apocalyptic number.

129040739 is a deficient number, since it is larger than the sum of its proper divisors (1).

129040739 is an equidigital number, since it uses as much as digits as its factorization.

129040739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 129040739 is about 11359.6099845021. The cubic root of 129040739 is about 505.3306190384.

The spelling of 129040739 in words is "one hundred twenty-nine million, forty thousand, seven hundred thirty-nine".