129320407 has 2 divisors, whose sum is σ = 129320408. Its totient is φ = 129320406.

The previous prime is 129320383. The next prime is 129320447. The reversal of 129320407 is 704023921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129320407 - 2¹⁹ = 128796119 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129320447) 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, 64660203 + 64660204.

It is an arithmetic number, because the mean of its divisors is an integer number (64660204).

Almost surely, 2^129320407 is an apocalyptic number.

129320407 is a deficient number, since it is larger than the sum of its proper divisors (1).

129320407 is an equidigital number, since it uses as much as digits as its factorization.

129320407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 129320407 is about 11371.9130756439. The cubic root of 129320407 is about 505.6954207033.

The spelling of 129320407 in words is "one hundred twenty-nine million, three hundred twenty thousand, four hundred seven".