129266273 has 2 divisors, whose sum is σ = 129266274. Its totient is φ = 129266272.

The previous prime is 129266243. The next prime is 129266281. The reversal of 129266273 is 372662921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116791249 + 12475024 = 10807^2 + 3532^2 .

It is a cyclic number.

It is not a de Polignac number, because 129266273 - 2⁶ = 129266209 is a prime.

It is not a weakly prime, because it can be changed into another prime (129266243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64633136 + 64633137.

It is an arithmetic number, because the mean of its divisors is an integer number (64633137).

Almost surely, 2^129266273 is an apocalyptic number.

It is an amenable number.

129266273 is a deficient number, since it is larger than the sum of its proper divisors (1).

129266273 is an equidigital number, since it uses as much as digits as its factorization.

129266273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 38.

The square root of 129266273 is about 11369.5326640984. The cubic root of 129266273 is about 505.6248488649.

The spelling of 129266273 in words is "one hundred twenty-nine million, two hundred sixty-six thousand, two hundred seventy-three".