129630439 has 2 divisors, whose sum is σ = 129630440. Its totient is φ = 129630438.

The previous prime is 129630433. The next prime is 129630503. The reversal of 129630439 is 934036921.

It is a weak prime.

It is an emirp because it is prime and its reverse (934036921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129630439 - 2⁷ = 129630311 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 129630398 and 129630407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129630433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64815219 + 64815220.

It is an arithmetic number, because the mean of its divisors is an integer number (64815220).

Almost surely, 2^129630439 is an apocalyptic number.

129630439 is a deficient number, since it is larger than the sum of its proper divisors (1).

129630439 is an equidigital number, since it uses as much as digits as its factorization.

129630439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 129630439 is about 11385.5363949179. The cubic root of 129630439 is about 506.0992152879.

The spelling of 129630439 in words is "one hundred twenty-nine million, six hundred thirty thousand, four hundred thirty-nine".