129244169 has 2 divisors, whose sum is σ = 129244170. Its totient is φ = 129244168.

The previous prime is 129244147. The next prime is 129244231. The reversal of 129244169 is 961442921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94575625 + 34668544 = 9725^2 + 5888^2 .

It is a cyclic number.

It is not a de Polignac number, because 129244169 - 2¹⁶ = 129178633 is a prime.

It is a super-2 number, since 2×129244169² = 33408110441001122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (129244769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64622084 + 64622085.

It is an arithmetic number, because the mean of its divisors is an integer number (64622085).

Almost surely, 2^129244169 is an apocalyptic number.

It is an amenable number.

129244169 is a deficient number, since it is larger than the sum of its proper divisors (1).

129244169 is an equidigital number, since it uses as much as digits as its factorization.

129244169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 38.

The square root of 129244169 is about 11368.5605509229. The cubic root of 129244169 is about 505.5960273002.

The spelling of 129244169 in words is "one hundred twenty-nine million, two hundred forty-four thousand, one hundred sixty-nine".