129394992169 has 2 divisors, whose sum is σ = 129394992170. Its totient is φ = 129394992168.

The previous prime is 129394992163. The next prime is 129394992173. The reversal of 129394992169 is 961299493921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109568944144 + 19826048025 = 331012^2 + 140805^2 .

It is a cyclic number.

It is not a de Polignac number, because 129394992169 - 2⁹ = 129394991657 is a prime.

It is a super-2 number, since 2×129394992169² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 129394992169.

It is not a weakly prime, because it can be changed into another prime (129394992163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64697496084 + 64697496085.

It is an arithmetic number, because the mean of its divisors is an integer number (64697496085).

Almost surely, 2^129394992169 is an apocalyptic number.

It is an amenable number.

129394992169 is a deficient number, since it is larger than the sum of its proper divisors (1).

129394992169 is an equidigital number, since it uses as much as digits as its factorization.

129394992169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17006112, while the sum is 64.

The spelling of 129394992169 in words is "one hundred twenty-nine billion, three hundred ninety-four million, nine hundred ninety-two thousand, one hundred sixty-nine".