129664001 has 2 divisors, whose sum is σ = 129664002. Its totient is φ = 129664000.

The previous prime is 129663971. The next prime is 129664013. The reversal of 129664001 is 100466921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104060401 + 25603600 = 10201^2 + 5060^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129664001 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (129604001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64832000 + 64832001.

It is an arithmetic number, because the mean of its divisors is an integer number (64832001).

Almost surely, 2^129664001 is an apocalyptic number.

It is an amenable number.

129664001 is a deficient number, since it is larger than the sum of its proper divisors (1).

129664001 is an equidigital number, since it uses as much as digits as its factorization.

129664001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 129664001 is about 11387.0101870509. The cubic root of 129664001 is about 506.1428887653.

The spelling of 129664001 in words is "one hundred twenty-nine million, six hundred sixty-four thousand, one".