129928607 has 2 divisors, whose sum is σ = 129928608. Its totient is φ = 129928606.

The previous prime is 129928583. The next prime is 129928609. The reversal of 129928607 is 706829921.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129928607 - 2²² = 125734303 is a prime.

Together with 129928609, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129928609) 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, 64964303 + 64964304.

It is an arithmetic number, because the mean of its divisors is an integer number (64964304).

Almost surely, 2^129928607 is an apocalyptic number.

129928607 is a deficient number, since it is larger than the sum of its proper divisors (1).

129928607 is an equidigital number, since it uses as much as digits as its factorization.

129928607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 129928607 is about 11398.6230308753. The cubic root of 129928607 is about 506.4869509685.

The spelling of 129928607 in words is "one hundred twenty-nine million, nine hundred twenty-eight thousand, six hundred seven".