172129606907 has 2 divisors, whose sum is σ = 172129606908. Its totient is φ = 172129606906.

The previous prime is 172129606897. The next prime is 172129606927. The reversal of 172129606907 is 709606921271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172129606907 - 2⁸ = 172129606651 is a prime.

It is not a weakly prime, because it can be changed into another prime (172129606927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86064803453 + 86064803454.

It is an arithmetic number, because the mean of its divisors is an integer number (86064803454).

Almost surely, 2^172129606907 is an apocalyptic number.

172129606907 is a deficient number, since it is larger than the sum of its proper divisors (1).

172129606907 is an equidigital number, since it uses as much as digits as its factorization.

172129606907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 571536, while the sum is 50.

The spelling of 172129606907 in words is "one hundred seventy-two billion, one hundred twenty-nine million, six hundred six thousand, nine hundred seven".