129706273 has 2 divisors, whose sum is σ = 129706274. Its totient is φ = 129706272.

The previous prime is 129706267. The next prime is 129706289. The reversal of 129706273 is 372607921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126495009 + 3211264 = 11247^2 + 1792^2 .

It is a cyclic number.

It is not a de Polignac number, because 129706273 - 2²¹ = 127609121 is a prime.

It is not a weakly prime, because it can be changed into another prime (129700273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64853136 + 64853137.

It is an arithmetic number, because the mean of its divisors is an integer number (64853137).

Almost surely, 2^129706273 is an apocalyptic number.

It is an amenable number.

129706273 is a deficient number, since it is larger than the sum of its proper divisors (1).

129706273 is an equidigital number, since it uses as much as digits as its factorization.

129706273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 129706273 is about 11388.8661858852. The cubic root of 129706273 is about 506.1978856480.

The spelling of 129706273 in words is "one hundred twenty-nine million, seven hundred six thousand, two hundred seventy-three".